RTU Modbus interface : MPNC006 Mect srl
21
ME7084_05 07/21
3.10
Watchdog
MPNC006 implements a watchdog function that resets the connected digital outputs
if no query is received within the time set in the variable XX_Watchdog (expressed
in seconds). To disable the watchdog function (default), simply set the variable to
zero.
Once the watchdog is triggered on MPNC006, the Run and On LEDs will flash
rapidly.
4
RTU ModBus registers map
The MPNC006 is a RTU ModBus bridge, which can interface with MECT terminals
such as MPNC020 MPNC030, MPNC035. The following table shows the memory
map.
ATTENTION:
within the Crosstable Editor it is possible to import directly the
variables associated to the registers . Press the right button inside the table and select
“Paste MPNC006 Variables”. The "Notes" column of the table below shows the
reference variable for the Crosstable (in bold).
Register
Description
Note
Type
1
Curent Baudrate
Default 9600
MPNC_Baudrate
R
2
Current Adress
Default 1
MPNC_NodeID
R
3
LifeTime
Device power on time (in
seconds)
MPNC_HeartBeat
R
5
MPNC30 Module 1 Configuration
channel 1 bit 0..3
channel 2 bit 4..7
channel 3 bit 8..11
channel 4 bit 12..15
Configuration values:
Hex 01: 0-20mA
Hex 02: 0-10V
Hex 03: Thermocouple J
Hex 04: Thermocouple K
Hex 05: Thermocouple T
Hex 06: PT100E (1°C resolution)
range: -40°C ÷ +800°C
Hex 07: PT100R (0.1°C resolution)
range: -40.0°C ÷ +200.0°C
Hex 08: not configured
Saved in ritentive
variables: 0-10V
Default configuration
Configuration example in
the PLC:
Channel 1 = PT100E
Channel 2 = 0-10V
Channel 3 = Thermocoup.
J
Channel 4 =
Thermocoup.K
MPNC_AnInConf_A :=
16#4326;
R/W
