Nivetec UNICONT PMM-500, Руководство пользователя и программирования, Страница: 30 / 32

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pmm5111a0600p_01
11.2 M
ODBUS
C
OMMUNICATION
The unit uses the following Modbus functions:
MODBUS
DECIMAL
FUNCTION CODE
PARAMETER
FORMAT
MODBUS MEANING DESCRIPTION
01/02 Bit Read coil/ Input status
Read output/input status bits at given
address
03/04 Word Read holding/Input registers
Read current binary value of specified
number of parameters at given
address.
Up to 64 parameters can be accessed
with one Query
05 Bit Force single coil
Writes a single binary bit to the
Specified Slave Bit address
06 Word Pre-set single register
Writes two bytes to a specified word
address
08 - Diagnostics Used for loopback test.
16 Word Pre-set multiple register
Writes up to 1 word parameter values
to the specified address range.
11.3 C
OMMUNICATION
P
ARAMETERS
Communication parameters RO indicates a parameter which is read only, R/W indicates it can also be
written to. Communications writes will not implemented if the

(Communications Write Parameter) is
disabled in the Configuration Mode.
11.3.1 B
IT
P
ARAMETERS
MODBUS PARAMETER
NUMBER MODE
CONTROLLING PARAMETER NOTES
1 RO
Communication Write Status 1 = Write Enabled
0 = Write Disabled
2 R/W
Auto / Manual 1 = Manual Control
0 = Automatic Control
3 R/W
Self Tune
1 = Activate(d)
0 = Dis-engage(d)
4 R/W
Pre tune
1 = Activate(d)
0 = Dis-engage(d)
5 RO
Alarm 1 Status 1 = Active
0 = Inactive
6 RO
Alarm 2 Status 1 = Active
0 = Inactive
7 R/W
Setpoint Ramping 1 = Enable(d)
0 = Disable(d)
10 R/W
Loop Alarm Status 1 = Active/Enable
0 = Inactive/Disable
12 R/W
Loop Alarm
Read to get loop alarm status.
Write 0/1 to disable/enable
Note:
To set the bit value to 1 write FF, to set the bit value to 0 write 00.