DGH MS 2000 Especificações

D1000 SERIES USERS MANUALREVISED: 10/1/97DGH CORPORATIONP. O. BOX 5638MANCHESTER, NH 03108TELEPHONE: 603-622-0452FAX: 603-622-0487URL: http://www.dghc

Functional Description 2-3Latching alarms are turned off with the Clear Alarms (CA) command or if theopposite alarm limit is exceeded.The state of th

RTS Operation G-5Command: #1RT2Response: *1RT2+00550.00E6Read Time Delay 3 (RT3)The RT3 command is used to read the time delay value previously store

RTS Operation G-6The RTS- command is write protected and the polarity value is stored inEEPROM memory. Therefore, all subsequent power ups will activ

RTS Operation G-7Command: #1T1+00100.00Response: *1T1+00100.008ASet Time Delay 2 (T2)Time delay T2 is used to ensure adequate time is allowed for the

RTS Operation G-8The response to a WE command is an asterisk indicating that the moduleis ready to accept a write protected command. Once the write p

Appendix HD1000/2000 SpecificationsSpecifications (typical @ +25° C and nominal power supply unlessotherwise noted.)Analog• Single channel analog inpu

Specifications H-2• Parity: odd, even, none.• User selectable channel address.• ASCII format command/response protocol.• Up to 122 multidrop modules

Specifications H-3D1300 Thermocouple Inputs• Thermocouple types: J, K, T, E, R, S, B, C (factory set).• Ranges:J = -200°C to +760°C B = 0°C to +1820°

Specifications H-4• Accuracy:2252Ω = ±0.1°C.TD = ±0.2°C• Common mode rejection: 100dB at 50/60Hz.• Input protection to 30Vdc .• User selectable °C or

Specifications H-5• Input Timer Range: 100 µs to 30s.• Pulse Count: Up to 10 million positive transitions.• Resolution: 0.005% of reading +0.01Hz (Fr

Functional Description 2-4

IntroductionThe D1000 modules has been carefully designed to be easy to interface toall popular computers and terminals. All communications to and fro

Communications 3-2an improper command prompt or address is transmitted. The table belowlists the timeout specification for each command:Mnemonic Time

Communications 3-3Figure 1.1 shows the connections necessary to attach one module to a host.Use the Default Mode to enter the desired address, baud r

Communications 3-4inherent in its structure. The daisy-chain is a series-connected structure andany break in the communications link will bring down

Communications 3-5if four modules are used in a chain operating at 1200 baud, the accumulateddelay time is 4 X 8.33 mS = 33.3 mS This time must be ad

Communications 3-6RS-485RS-485 is a recently developed communications standard to satisfy theneed for multidropped systems that can communicate at hi

Communications 3-7

Communications 3-8RS-485 Multidrop SystemFigure 3.2 illustrates the wiring required for multiple-module RS-485 sys-tem. Notice that every module has

TABLE OF CONTENTSWarranty 4CHAPTER 1 Getting StartedDefault Mode 1-1Quick Hook-Up 1-2CHAPTER 2 Functional DescriptionBlock Diagram 2-4CHAPTER

Communications 3-9becomes an important consideration. The GND wire is used both as a powerconnection and the common reference for the transmission li

The D1000 modules operate with a simple command/response protocol tocontrol all module functions. A command must be transmitted to the moduleby the ho

Command Set 4-2Data StructureMany commands require additional data values to complete the commanddefinition as shown in the example commands in Table

Command Set 4-3appears when large data values saved in the module’s EEPROM are readback. In most practical applications, the problem is non-existent.

Command Set 4-4following the ‘ * ‘ prompt. The response format of all commands may be foundin the detailed command description.The maximum response m

Command Set 4-5the two extra characters and assumes that it is a checksum. If the checksumis not present, the module will perform the command normall

Command Set 4-6The checksum is the two characters preceding the CR: A4Add the remaining character values:* 1RD+00072. 102A + 31 + 52 + 44 + 2B + 30 +

Command Set 4-7EC Events Read & Clear $1EC *0000107HI Set High Alarm Limit $1HI+12345.67L *ID IDentification $1ID BOILER *LO Set Low Alarm Limit

Command Set 4-8or SetPoint (SP) command.Command: $1CZResponse: *Command: #1CZResponse: *1CZF8Disable Alarms (DA)Most D1000 modules feature LO/DO0 and

Command Set 4-9For example: A typical response from a $1DI command could be: *01FE.This response indicates that the HI alarm is off, the LO alarm is

WARRANTYDGH warrants each D1000 and D2000 series module to be free from defectsin materials and workmanship under normal conditions of use and service

Command Set 4-10Enable Alarms (EA)Digital outputs DO0/LO and DO1/HI serve a dual purpose as both digitaloutputs and alarms. Digital output 0 is share

Command Set 4-11The alarm limit should be set within the output range of the module. If thealarm limit is set beyond the output range, the alarm will

Command Set 4-12The low limit value may be read back with the Read Low Limit (RL)command. More information on alarms may be found in Chapter 6.New Da

Command Set 4-13Pulse Transition (PT)The Pulse Transition command is used on Frequency and Timer inputmodules. It is used to set the direction of the

Command Set 4-14The Remote Reset (RR) command or a line break does not effect the valueof the Event Counter.When reading the Event Counter with a che

Command Set 4-15Read Low Alarm (RL)The Read Low alarm command reads the value and type of the low alarm.The alarm type can be either latching or mome

Command Set 4-16Read Setup (RS)The read setup command reads back the setup information loaded into themodule’s nonvolatile memory with the SetUp (SU)

Command Set 4-17To clear a setpoint, use the Clear Zero (CZ) command.The SP command writes over data written into the Output Offset Register bythe Tr

Command Set 4-18Caution! TS is the only command associated with the span trim. There is noprovision to read back or clear errors loaded by the TS com

Command Set 4-19The SetPoint (SP) command will write over any value loaded by the TZcommand.Write Enable (WE)Each module is write protected against a

Chapter 1Getting StartedDefault ModeAll D1000 modules contain an EEPROM (Electrically Erasable Program-mable Read Only Memory) to store setup informat

Command Set 4-20ERROR MESSAGESThe D1000 modules feature extensive error checking on input commandsto avoid erroneous operation. Any errors detected w

Command Set 4-21to ensure proper operation of the microprocessor. The timer may be trippedif the microprocessor is executing its program improperly d

The D1000 modules feature a wide choice of user configurable optionswhich gives them the flexibility to operate on virtually any computer orterminal b

Setup & SetUp Command 5-2Command SyntaxThe general format for the SetUp (SU) command is:$1SU[byte1][byte 2][byte 3][byte 4]A typical SetUp comman

Setup & SetUp Command 5-3When using the SU command to change the address of a module, be sureto record the new address in a place that is easily

Setup & SetUp Command 5-4Byte 2Byte 2 is used to configure some of the characteristics of the communica-tions channel; linefeeds, parity, and bau

Setup & SetUp Command 5-5changing the baud rate of an RS-232C string. For more information onchanging baud rate, refer to Chapter 3.Let’s run thr

Setup & SetUp Command 5-6responds. The last resort is to set the module to Default Mode where thebaud rate is always 300.Setting a string of RS-2

Setup & SetUp Command 5-7High Alarm LatchBit 5 determines whether the HI Alarm is latching or momentary. A’1'indicates latching. Bit 5 is a

Setup & SetUp Command 5-8delay is added to the typical command delays listed in the SoftwareConsiderations section of Chapter 3. Each unit of del

Getting Started 1-2values. In most cases, a module in Default Mode may not be used in a stringwith other modules.RS-232 & RS-485 Quick Hook-UpSof

Setup & SetUp Command 5-9Byte 4This setup byte specifies the number of displayed digits and the digital filtertime constants.Number of displayed

Setup & SetUp Command 5-10filter constant after every A/D conversion. The constant selected dependson the magnitude of the change of the input si

Setup & SetUp Command 5-11Small Signal Time ConstantBits 0,1, 2 specify the filter time constant for small signals. Its values aresimilar to the

Setup & SetUp Command 5-12to echo so that it may be used in a daisy-chain (See Communications). Readout the current setup with the Read Setup co

The D1000 series features versatile digital I/O capability to interface toauxiliary equipment. The functions available are:1) Digital Outputs2) Digita

Digital I/O Functions 6-2connection to a logic input is shown in Figure 6.2. In some cases, thecommon-mode voltage of the GND terminal may be signifi

Digital I/O Functions 6-3Digital inputs are used to sense switch closures and the state of digitalsignals. The inputs are protected to voltages up to

Digital I/O Functions 6-4The Event Counter is read by using the Read Events (RE) command. Themaximum accumulated count is 9,999,999. If the maximum c

Digital I/O Functions 6-5Alarm limit values are loaded into the module with the Low limit (LO) andHi limit (HI) commands. The limit values are stored

Digital I/O Functions 6-6Figure 6.5 On-Off ControllerON-OFF CONTROLLER WITH HYSTERESISThe simple single-value controller, by its very nature, suffers

Getting Started 1-3RS-485 Quick Hook-up to a RS-232 portAn RS-485 module may be easily interfaced to an RS-232C terminal forevaluation purposes. This

Digital I/O Functions 6-7The high and low alarm limits on the D1000 sensor modules may be set toprovide on-off control with hysteresis. The two limit

Digital I/O Functions 6-8

Digital I/O Functions 6-9SETPOINTIn the preceding example, the low and high alarm limits are used to specifya hysteresis value around a desired setpo

Digital I/O Functions 6-10The benefit of using SP command is that only one command is necessaryto change the setpoint value. The hysteresis is stored

D1000 modules may be powered with an unregulated +10 to +30Vdc.Power-supply ripple must be limited to 5V peak-to-peak, and the instanta-neous ripple v

Symptom:RS-232 Module is not responding to commandsRS-485 Module is not responding to commandsEvents counter not counting properly.Error in displayed

• RS-485 Module is not responding to commands1. Perform steps 1, 2, 4, 5 and 6 listed above.2. Ensure that module RS-485 "Data" line (module

The D1000 module is initially calibrated at the factory and has a recom-mended calibration interval of one year. Calibration constants are stored inth

Calibration 9-2This sequence will trim the output to +00900.00. Verify:Command: $1RDResponse: *+00900.00The module is calibrated.Thermocouples: Disabl

Calibration 9-3Table 9.1 Calibration ValuesModel Input Stimulus Output Data °FD110X +9000µV +09000.00D111X +90mV +00090.00D112X +900mV +00900.00D113X

Getting Started 1-4Figure 1.3 RS-485 Quick Hook-Up with RS-232C Port.

Chapter 10Extended AddressingThe D1000 may be configured to a special command format calledExtended Addressing. This mode uses a different prompt, eit

The Extended Address commands use a two-character ASCII address,each character may be one of 122 legal possibilities. Illegal charactersare: NULL ($00

Table of ASCII characters (A) and their equivalent values in Decimal (D),Hexadecimal (Hex), andBinary.Claret (^) represents Control function.A D Hex B

ASCII Tables A-2A D Hex Binary D Hex Binary# 35 23 00100011 163 A3 10100011$ 36 24 00100100 164 A4 10100100% 37 25 00100101 165 A5 10100101& 38 2

ASCII Tables A-3A D Hex Binary D Hex BinaryL 76 4C 01001100 204 CC 11001100M 77 4D 01001101 205 CD 11001101N 78 4E 01001110 206 CE 11001110O 79 4F 01

ASCII Tables A-4A D Hex Binary D Hex Binaryu 117 75 01110101 245 F5 11110101v 118 76 01110110 246 F6 11110110w 119 77 01110111 247 F7 11110111x 120 7

The Frequency and Timer Input modules feature a versatile input stage thatcan be used in a variety of applications. Figure 1 is a block diagram of the

D1600 Data Sheet B-2Figure B-2. Controlling Hysteresis For Positive-Going SignalsThis connection is used for unipolar positive-going frequency signals

D1600 Data Sheet B-3Figure B-3. Controlling Hysteresis For Bipolar Signals. R Open ØΩ 34 VhysteresisR (in KΩ)

D1600 Data Sheet B-4module contains an internal 1MΩ resistor connected from the +IN to +2.5Vfor biasing. A .01 uf cap may be used for frequencies down

A functional diagram of a typical module is shown in Figure 2.1. It is a usefulreference that shows the data path in the module and to explain the fun

D1600 Data Sheet B-5Event CounterThe Event Counter input is connected to the Digital Input 0 terminal. It canbe used to count any low speed event that

SPECIFICATIONS: (Typical @ 25°C, V+ = +15V)RTD Types: =.00385, .00388, .00392 100Ω @ 0°CResolution: 0.1°Accuracy: ±0.3°CInput connections: 2, 3, or 4

4-Wire: For 4-wire operation, connect the RTD as shown in the diagram. Ifthe RTD has heavy excitation wires, they should be connected to the +I and-I

Appendix DD1500 Data SheetThe D1500 Bridge Sensor Interface Modules contain all of the signalconditioning functions necessary to interface Strain Gage

D1500 Data Sheet D-2Figure D-1 Bridge Circuit WiringTo perform an initial offset trim, attach the bridge unit to the module (asshown in Figure 1). C

D1500 Data Sheet D-3Example 1:A load cell to be used in a weighing application is mated to a D1521 module.The load cell is rated for 3mV/V, which re

D1500 Data Sheet D-4The initial offset is +2.34mV. The D1521 has a useful input range of ±60mV.After subtracting the offset the “input overhead” is

D1500 Data Sheet D-5This value is within the ±30mV offset necessary to provide enough head-room for the strain gage bridge.Trim out the remaining o

D1500 Data Sheet D-6Step 1: power up the unit under test and let it warm up for at least twominutes.Step 2: set the voltage source to 0 volts (short

D1500 Data Sheet D-7Calibration Example:We wish to calibrate a D1511 module. This unit contains 5V excitation anda ±30mV input.Step 1 is straightfo

Functional Description 2-2undesired signal such as a tare weight. The Trim Zero (TZ) command is usedto adjust the output to any desired value by load

D1500 Data Sheet D-8To specify continuous output, add a “C” suffix to the model number; D1511Cfor example.Programmable ScalingThe D2500 series of in

The D2000 series is an enhancement of the D1000 series. As shipped fromthe factory, the D2000 modules operate in the same manner as their D1000counte

Appendix FD1000/2000 Continuous OperationAll D1000/2000 computer interface modules may be factory-configured toprovide continuous output of analog inp

Continuous Operation F-2For dedicated output-only applications the RECEIVE input of RS-232modules serves no purpose and may be disconnected to elimin

Continuous Operation F-3execute the S1000 utility software (filename = 100030.exe). At the mainmenu, select HOST and specify the correct serial compu

Continuous Operation F-4Install/Test the configurationThe module setup modifications are complete. Both modules may nowbe bench tested or installed i

Appendix GRTS OperationThe D1000R/2000R series analog input modules interface to radio andleased telephone line modems. Many of these modems require

RTS Operation G-2be specified using the standard data format ‘+#####.##’. Use the writeprotected commands T1, T2 and T3 to specify the delay time val

RTS Operation G-3The RTS output and the delay time values are disabled while in DefaultMode.The RTS output is located on digital output bit 0 (DO0/RT

RTS Operation G-4The ID command is write protected and checksums are not supported. Themodule will abandon any ID command with a message length in ex