22
NT538
MODBUS MAPPING TABLE
HEADER (information and commands):
Address
LO
(10)
Data HI Data LO
R: read
W:write
RW:
read/write
1
Model – MSD (ASCII) Model - 3° Digit (ASCII) R
2
Model - 2° Digit (ASCII) Model – LSD (ASCII) R
3
Space (20H) Vers. Fw – MSD(ASCII) R
4
Vers. Fw - 2° Digit (ASCII) Vers. Fw – LSD(ASCII) R
5
Channels qty (2*ASCII)
R
6
Options (see note)
Options (see note) R
7
00
Wrong datum received R-see tab.
8
00 Info various causes R-see tab
9
00 Commands W-see tab.
SYSTEM: Setting and Status
Address
LO
(10)
Data HI Data LO Note 1 Note 2
R: read
W:write
RW:
read/write
10
00
HFN (Fan test)
0=No test
1÷200h
RW
11 00 FCD
temperature
increment
0=No FCD
1÷30°/sec
RW
12 00 Voting
0=No Voting
1-2-3
RW
13
00 CPU Setting See Note RW
14
00 CPU Error See Note R
15
00 Relays Status
See Note
R
16
00
420 mA channel
reference
channel for 4.20
mA
0=hot
1÷8= ch1÷8
9 =scan
RW