Specifications

Command Set 4-6
The checksum is the two characters preceding the CR: A4
Add the remaining character values:
* 1RD+00072. 10
2A + 31 + 52 + 44 + 2B + 30 + 30 + 30 + 37 + 32 + 2E + 31 + 30 = A4
The two lowest-order hex digits of the sum are A4 which agrees with the
transmitted checksum.
The transmitted checksum is the character string equivalent to the calcu-
lated hex integer. The variables must be converted to like types in the host
software to determine equivalency.
If checksums do not agree, a communications error has occurred.
If a module is setup to provide linefeeds, the linefeed characters are not
included in the checksum calculation.
Parity bits are never included in the checksum calculation.
Table 4.1 D1000 Command Set
Command and Definition Typical Typical
Command Response
Message Message
($ prompt)
DI Read Alarms/Digital Inputs $1DI *0003
DO Set Digital Outputs $1DOFF *
ND New Data $1ND *+00072.00
RD Read Data $1RD *+00072.00
RE Read Event Counter $1RE *0000107
REA Read Extended Address $1REA *3031
RH Read High Alarm Value $1RH *+00510.00L
RID Read IDentification $1RID * BOILER
RL Read Low Alarm Value $1RL *+00000.00L
RPT Read Pulse Transition $1RPT *+-
RS Read Setup $1RS *31070142
RZ Read Zero $1RZ *+00000.00
WE Write Enable $1WE *
Write Protected Commands
CA Clear Alarms $1CA *
CE Clear Events $1CE *
CZ Clear Zero $1CZ *
DA Disable Alarms $1DA *
EA Enable Alarms $1EA *