Modbus Register And Function Code Summary - Honeywell HA20 Technical Manual

HA20 2-Channel Controller
3.2.1 Modbus Register And Function Code
Summary
The following table identifies HA20 Modbus register locations and
function codes.
VARIABLE
Read/Write Coils:
Alarm Ack/Reset 2001
NOTE:
After writing a TRUE to this register, the HA20/40 will reset it to FALSE.
Read Only Discrete:
Chan 1 Alarm 1
Chan 1 Alarm 2
Chan 1 Alarm 3/Flt
Chan 2 Alarm 1
Chan 2 Alarm 1
Chan 2 Alarm 3/Flt
Relay 1
Relay 2
Read Only Registers:
A2D Raw Chan 1
A2D Raw Chan 2
10 bit value representing the A2D value of 0 to 1023 for -25 to 103 %FS
(197=0% & 1003=100%).
D2A Chan 1
D2A Chan 2
10 bit value representing the D2A value of 0 to 1023 after all cal features
are applied.
HA20 Technical Manual
READ WRITE
ALIAS FUNCTION FUNCTION
CODE CODE
1 5
12001 2 NA
12002 2 NA
12003 2 NA
12004 2 NA
12005 2 NA
12006 2 NA
12007 2 NA
12008 2 NA
31001 4 NA
31002 4 NA
31003 4 NA
31004 4 NA
Chan 1 Status
Chan 2 Status
16 bit status word bit assignment for each channel.
System Status Word
16 bit status word bit assignment for system status.
Alarm Status Word
16 bit status word bit assignment for system status.
3-7
31005 4 NA
31006 4 NA
ALARM1_BELOW_BIT BIT0
ALARM2_BELOW_BIT BIT1
ALARM3_BELOW_BIT BIT2
ALARM1_LATCH_BIT BIT3
ALARM2_LATCH_BIT BIT4
ALARM3_LATCH_BIT BIT5
ALARM3_ACTIVE_BIT BIT6
CHANNEL_DISABLED_BIT BIT7
CHANNEL_CAL_BIT BIT8
31007 4 NA
PIEZO_DRIVE BIT6
HORN_ACK BIT7
K1_HORN_DRIVE BIT8
K2_HORN_DRIVE BIT9
K1_HORN_PULSE BIT10
K2_HORN_PULSE BIT11
K1_FAILSAFE BIT12
K2_FAILSAFE BIT13
K2_ACK BIT14
LOCK BIT15
31008 4 NA