Licht
http://www.licht-labs.com
Rev. A1 (20–05–09) MFC-400/I-IAC and I-IDC Technical Manual
13
C MODBUS registers
The MFC-400 implements the
Read Holding Register
(0x03),
Write Single Register
(0x06)
and
Write Multiple Register
(0x10) MODBUS RTU functions. A frame referring to any
other function will be answered with an "unsupported function code" exception.
We present below a table of remotely accessible registers, considering a device with 6
input channels. Not all registers may be accessible in some devices, given that not all
channels or relays may be installed. For example, a device with 4 channels will return an
"illegal data address" exception whenever registers corresponding to channels 5 or 6 are
accessed.
Holding
Register
Description
Values
Multiplier
201
Sampling Factor
1 to 1000
1
202
AC frequency
0: 60 Hz
1: 50 Hz
1
301
Current Loop - Output Scale
0: 0-1 mA
1: 0-5 mA
2: 0-10 mA
3: 0-20 mA
4: 4-20 mA
1
302
Current Loop - Full Scale
0.01 to 10.00 A
100
501
Measured Current
0.000 to 10.000 A
1000