41 Rev. 2.4 (3/05)
Honeywell Analytics CM4 Protocol Manual
Set Relay State This command allows you to congure the relay
0x5F states. The relays are normally de-energized,
and can be congured to operate in the energized
fail-safe condition. When the relays are latched,
they are cleared by operator intervention. Non-
latching relays are cleared automatically once the
concentration decreases below the alarm level
threshold, or the fault is corrected without operator
intervention.
Command packet to instrument:
Command Code (0x5F) - 1 byte
Relay Flags - 1 byte
bit 0: Relay state
0 = De-energized
1 = Energized
bit 1: Relay latching state
0 = Non-latching
1 = Latching
bits 2-7: Undened
Response packet from instrument:
Command Code (0x5F) - 1 byte
CM4 Date - 2 bytes
CM4 Time - 2 bytes
Status - 1 byte
0x00 = relays state set
0xff = Error, relays state not
changed
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