Chromalox 6050 User Manual

68
6050 & 4050 Controllers –
Serial Communications Parameters
The Modbus parameter addresses and the possible
ASCII message types and parameters indents for the
6050 & 4050 are detailed below. RO indicates a param-
eter is read only, R/W indicates it can also be written to.
Communications writes will not be implemented if the
Communications Write Parameter is disabled. Refer to
the Modbus and ASCII Communications sections of
this manual for details of the protocols used.
Bit Parameters
Bit parameters are not applicable to the ASCII protocol.
Table 29. 6050 & 4050 Communications - Bit Parameters
Parameter
Modbus
Parameter No. Notes
Communication
Write Status
1 RO 1 = Write Enabled, 0 = Write Disabled. A negative acknowl-
edgement (exception code 3) is sent to write commands if
communications writes are disabled
Limit Action 2 RO 1 = Low Limit, 0 = High Limit
Reset Limit Relay 3 R/W 1 = Reset Latched Relays. A read returns the values 0
Limit Status 4 RO 1 =In Exceed Condition, 0 = Not in Exceed Condition
Alarm 1 Status 5 RO 1 = Active, 0 = Inactive
Alarm 2 Status 6 RO 1 = Active, 0 = Inactive
Limit Output Status 7 RO 1 = Relay latched, 0 = Relay not latched
Annunciator Output Status 8 RO 1 = Active, 0 = Inactive
To set the bit value to 1 write FF, to set the bit value to 0 write 00. Refer to Function Code 05 in the Modbus
Communications section.
Word Parameters
Table 30. 6050 & 4050 Communications - Word Parameters
Parameter
Modbus
Parameter No.
ASCII is no longer
Supported Notes
Process Variable 1 RO Current value of PV.
If under-range = 62976 (<??>5 ASCII)
If over-range = 63232 (<??>0 ASCII)
If Sensor break = 63488 (ASCII = n/a)
Limit Setpoint 2 R/W Value of the Limit Setpoint
Hold Value 3 R/W Highest PV value (High Limit Action) or Lowest PV
value (Low Limit Action) since this parameter was
last reset.
Modbus: Write any value to reset
ASCII: See Controller Command 00160 for reset.
Deviation 4 RO Difference between Process Variable and Setpoint
(value = PV-SP)
Time Exceeded
Value
5 R/W Accumulated time of Limit SP exceed conditions
since this parameter was last reset.
Modbus: Write any value to reset
ASCII: See Controller Command 00170 for reset
Limit Hysteresis 6 R/W A band on the “safe” side of the Limit SP. Ad-
justable 0 to 100% of span. A latched limit relay
cannot be reset until the process passes through
this band

Chromalox 6050 Specifications

General

Brand	Chromalox
Model	6050
Category	Controller
Language	English