Masibus 5002U-P, User Manual

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TEMPERATURE CONTROLLER 5002U-P
REF NO: m55A/om/201
Issue NO: 03
Page 30 of 35
automatically. Calibration for Retransmission output is over. Press MENU key to
calibrate other parameters or press Escape key to come out to normal operation.
Group Calibration Detail:-
NOTE:
If you calibrate any input from any group i.e. I/P E-TC from Group
– 1 then calibration
is not required for other input types from Group-1.
11. COMMUNICATION DETAILS
The MODBUS Communications protocol as RS-485 interface module is installed. Only
RTU mode is supported. Data is transmitted as 8-bit binary bytes with 1 start bit, 1/2
stop bit and optional parity checking (None, Even, Odd). Baud rate may be set to 9600
and 19200.
11.1 Function codes use for Modbus
CODE NAME Function
01 Read coil status Use to read Relay and Digital output status
03 Read Holding registers Use to read PV, Control, RSP output etc
04 Read input registers Use to read programmable registers
06 Preset Single register Use to write programmable register
11.2 Exception responses for Modbus
11.3 Modbus parameters
Sr.
No
Parameter
Absolute
address Data
Type Minimum
value Maximum
value Access
Type
1 RELAY 1 1 bit 0 1 R
2 RELAY 2 2 bit 0 1 R
3 RELAY 3 3 bit 0 1 R
4 RELAY 4 4 bit 0 1 R
Group
NO
Input type Calibration for input
1 E,J,K,T,N,C,G,0-75mv,0-100mv Either of any input
2 Pt-100(RTD) Specific input
3 B,R,S,-10 to 20mv Either of any input
4 0-2V,0.4-2V,4-20mAmp,0-20Amp Either of any input
5 0-10V,0-5v,1-5V Either of any input
Code Name Meaning
01
ILLEGAL
FUNCTION
The function code received in the query is not an allowable action
for the slave. If a Poll Program Complete command was issued,
this code indicates that no program function preceded it.
02
ILLEGAL
DATA
ADDRESS
The data address received in the query is not an allowable address
for the slave
03
ILLEGAL
DATA VALUE
A value contained in the query data field is not an allowable value
for the slave
06
SLAVE
DEVICE
BUSY
When Master device write some parameters to Slave device If slave
device busy it will send 06 code to indicate slave device is busy.