DGH Data Acquisition - Discrete Digital I/O Command Set

D1700 Series Command Set

The DGH D1700 series products use a simple command and response protocol. A module must be interrogated by a host computer to obtain data. A module will never initiate a command sequence in order to prevent communications collisions.

A command is initiated with a command prompt, may be a dollar sign ($) or pound sign (#). Following the prompt a single address character must be transmitted. Each module on a communications bus must be setup with a unique address. The address is followed by a two character command. Every command is terminated with a carriage return.

The module response begins with a response prompt, which is an asterisk (*) followed by the necessary data. Every response is terminated with a carriage return. Linefeeds after the carriage return are user selectable. See the table below for typical commands and their respective response messages.

Command Definition	Typical Command	Typical Response
ACK - Acknowledge	$1ACK	*
CB - Clear Bit	$1CB0C	*
CP - Clear Position	$1CP12	*
DI - Digital Input	$1DI	*0007
DO - Digital Output	$1DO1234	*
RA - Read Assignments	$1RA	*0F0F
RAB - Read Assignment Bit	$1RAB0E	*O
RAP - Read Assignment Position	$1RAP14	*I
RB - Read Bit	$1RB0E	*1
RD - Read Data	$1RD	*+99999.99
RE - Read Event Counter	$1RE	*0001107
RID - Read IDentification	$1RID	*BOILER
RIV - Read Initial Value	$1RIV	*0F0F
RP - Read Position	$1RP14	*0
RS - Read Setup	$1RS	*31070002
RSU - Read Setup	$1RSU	*31070002
RWT - Read Watchdog Timer	$1RWT	*+00010.00
SB - Set Bit	$1SB0C	*
SP - Set Position	$1SP12	*
WE - Write Enable	$1WE	*

Write Protected Commands
AIB - Assign Input Bit	$1AIB0E	*
AIO - Assign Input/Output	$1AIO0F0F	*
AIP - Assign Input Position	$1AIP14	*
AOB - Assign Output Bit	$1AOB0E	*
AOP - Assign Output Position	$1AOP14	*
CE - Clear Events	$1CE	*
EC - Events Clear	$1EC	*0000100
ID - IDentification	$1IDBOILER	*
IV - Initial Value	$1IV0F0F	*
RR - Remote Reset	$1RR	*
SU - Setup	$1SU310701C2	*
WT - Watchdog Timer	$1WT+00010.00	*

Continuous Input/Output Mode Commands
CIA - Set Continuous Input Address	$1CIA31	*
CMC - Continuous Mode Change	$1CMC	*
CMD - Continuous Mode Disable	$1CMD	*
CME - Continuous Mode Edge Triggered	$1CME	*
CMT - Continuous Mode Timer	$1CMT	*
CT - Continuous Time (Set Time)	$1CT+00010.00	*
RCM - Read Continuous Mode	$1RCM	*D,T,E,C
RCT - Read Continuous Time Variable	$1RCT	*+00010.00
RIA - Read Continuous Input Address	$1RIA	*31
Notes: 1. T 2. The D1701 and D1702 modules utilize the D1000 series command set. Click here to view the D1000 command set.