Honeywell HA40 Manual Do Utilizador
HA40 4-Channel Controller
Revision 1 (08/08)
HA40 Technical Manual
3-6
3�2 MODBUS RS-232 / RS-485 Interface Option
(P/N 10-0253)
The 10-0253 Modbus option PCB add both RS-232 and RS-485
Modbus RTU slave ports. Figure 3-7 shows this optional PCB,
which mounts to connectors on the upper right corner of the HA40
motherboard. TB1 provides two pairs of T/Rx terminals and a floating
terminal for shield continuation. This makes it easy to multi-drop
HA40s onto an RS-485 cable without doubling wires into the same
screw terminals. RS-232 interface may be made by connecting to
DB9 connector S1.
Modbus RTU slave ports. Figure 3-7 shows this optional PCB,
which mounts to connectors on the upper right corner of the HA40
motherboard. TB1 provides two pairs of T/Rx terminals and a floating
terminal for shield continuation. This makes it easy to multi-drop
HA40s onto an RS-485 cable without doubling wires into the same
screw terminals. RS-232 interface may be made by connecting to
DB9 connector S1.
Section 3.3.1
lists all modbus registers and their
function codes.
Caution
Follow correct IEEE RS-232 and RS-485 installation guidelines when
using the 10-0253 option.
Figure 3-7. HA40 Modbus Interface Option (P/N 10-0253)
3�2�1 MODBUS Register And Function Code
Summary
Summary
The following table identifies the available modbus RTU register
locations and function codes.
locations and function codes.
VARIABLE
ALIAS
READ
FUNCTION
CODE
WRITE
FUNCTION
CODE
Read/Write Coils:
Alarm Ack/Reset
Alarm Ack/Reset
2001
1
5
note:
After writing a TRUE to this register, the HA40 automatically returns it to
After writing a TRUE to this register, the HA40 automatically returns it to
FALSE.
Read Only Discrete:
Chan 1 Fault Alarm
Read Only Discrete:
Chan 1 Fault Alarm
12001
2
NA
Chan 1 Alarm 1
12002
2
NA
Chan 1 Alarm 2
12003
2
NA
Chan 1 Alarm 3
12004
2
NA
Chan 2 Fault Alarm
12005
2
NA
Chan 2 Alarm 1
12006
2
NA
Chan 2 Alarm 2
12007
2
NA
Chan 2 Alarm 3
12008
2
NA
Chan 3 Fault Alarm
12009
2
NA
Chan 3 Alarm 1
12010
2
NA
Chan 3 Alarm 2
12011
2
NA
Chan 3 Alarm 3
12012
2
NA
Chan 4 Fault Alarm
12013
2
NA
Chan 4 Alarm 1
12014
2
NA
Chan 4 Alarm 2
12015
2
NA
Chan 4 Alarm 3
12016
2
NA