Chromalox 1020 User Manual

54
16 Modbus Addresses
Register addresses are given in Decimal and Hexadecimal formats.
Parameter access can be Read Only (RO), Write Only (WO) or Read & Write (R/W)
16.1 Input Parameters
Parameter Name
Modbus
Address
(Dec)
Modbus
Address
(Hex)
Access
R/W Notes
Process Variable
1070
42E RO Read process variable value
Actual Setpoint
1270
4F6 RO
Actual effective setpoint (e.g. instantaneous value when
setpoint in ramping). Not applicable for limiter
Setpoint
1200
4B0 R/W
Target controller Setpoint, settable within setpoint upper/
lower limit values. Not applicable for limiter
Limit Value
1481
5C9 R/W
The ‘Exceed’ value at which the limit output will trip. Set-
table within the input range. Limiter only.
Limit Exceed Status
1492
5D4 RO
0 = Limit value not exceeded
1 = Limit value exceeded
Alarm 1 Value
1402
57A R/W Alarm 1 value. Limited by the input span
Alarm 2 Value
1406
57E R/W Alarm 2 value. Limited by the input span
Alarm 1 Status
1470
5BE RO 0 = Alarm 1 inactive, 1 = Alarm 1 active
Alarm 2 Status
1471
5BF RO 0 = Alarm 2 inactive, 1 = Alarm 2 active
Output Latch
Status
1170
47F RO
A bit mask where bit 1 = Output 1 latched, bit 2 = Output
2 latched, bit 3 = Output 3 latched. E.g. binary 00000101 =
outputs 1 & 3 are latched
Latch Reset
1151
492 WO
1 = Attempts to reset all latched outputs (effect is subject
to process conditions)
Sensor Break
Status
1072
430 RO 0 = Ok, 1 = Sensor Break
Control Enable/Dis-
able
1375
55F R/W
0 = Control Disabled, 1 = Control Enabled
Not applicable to Limiter model
Control Enable
State
1376
560 RO
0 = Control Disabled, 1 = Control Enabled
Not applicable to Limiter model
Manual Power
Enable
1315
523 R/W
0 = Automatic Control, 1 = Manual Control
Not applicable to Limiter model.
Combined Power
(Manual Power in
Manual Mode)
1316
524 RO/RW
A read only combined heat/cool power level in automatic
mode, or used to write the power level in manual mode.
-100 (max cooling) to 100 (max heating)
Not applicable to Limiter model.
Heat Power Output
(Primary)
1370
55A RO 0-100% heating/primary power. Not applicable on Limiter
Cool Power Output
(Secondary)
1371
55B RO
0-100% cooling/secondary power. Not applicable on Lim-
iter
Automatic Tuning
1384
568 R/W
Read: 0 = Inactive, 1 = PreTune Active 2 = Tune at SP Active
Write: 0 = Stop Tune, 1 = Run PreTune 2 = Run Tune at SP

Chromalox 1020 Specifications

General

Brand	Chromalox
Model	1020
Category	Temperature Controller
Language	English