Watts AERCO SmartPlate SP23 - Page 101

SmartPlate Installation, Operation & Maintenance Manual
APPENDIX A – MODBUS CONTROL AND COMMUNICATION
OMM-0069_0H • SP-100 • 1/30/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 101 of 134
A.2 MODBUS COMMUNICATION INFORMATION
NOTE:
The Eurotherm 2400 Controller supports the MODBUS RTU mode of transmission. The
default settings are as follows: 9600 Baud Rate, one start bit, eight data bits, one stop bit, &
no parity bit.
EUROTHERM SERIES 2400 CONTROLLER MODBUS POINTS
MODBUS
Data
Address
Menu
Item
Menu Item
Description
Units & Range
Default/Comments
Register
Type
Ref. 1
Comm.
Guide
5
w.SP
Setpoint
40-205°F
140°F, Address to
read value
Read
Only
5-4
24
SP 1
Setpoint
40-180°F
140°F, Address to
change value
Write
5-11
1
Top
Value
Outlet Temp
40-205°F
Same value as front
display
Read
Only
5-3
133
LoGH
Peak Temp
40-205°F
Resets on Power
Loss
Read
Only
5-15
135
LoGA
Average
Temp
40-205°F
Resets on Power
Loss
Read
Only
5-15
134
LoGL
Low Temp
40-205°F
Resets on Power
Loss
Read
Only
5-15
13 (set)
74 (status,
0 = safe
1 = alarm)
AL 1
Over Temp
Alarm
40-205°F
20°F above setpoint;
Alarm Type 17:
Deviation High
Read
Only
5-7
5-20
14 (set)
74 (status,
0 = safe
1= alarm)
AL 2
(FSH)
Full Scale
High Alarm
205°F
205 ° F
Alarm Type 2: Full
Scale High
Read
Only
5-7
5-20
258
Sbr
Feedback
Sensor
Break
Status:
0: Good
1: Failed
Denotes Feedback
Sensor Failure/Open
Circuit
Read
Only
5-18
289
Li 1
Feedback
Sensor
Temp
40-180°F
Sensor input to
controller, same as
display temp.
Read
Only
5-14
290
Li 2
Feed Forward
Temperature
40-180°F
Sensor input to
controller
Read
Only
5-14
3
OP
Control
Output
Signal
%
Correlates to valve
position
Read
Only
5-4
REFERENCE DOCUMENTS:
1. Eurotherm 2000 Series Communications Handbook, # HA026230
2. Eurotherm 2404/2408 Control Setpoint Programmer Installation and Operation
Handbook, # HA025132