USER MANAUL
MGA
prime Q
MRU GmbH, D-74172 Neckarsulm
101 /
117
17.3.
RS485 Extern
RS485 interface with modbus RTU protocol for far distance data transfer
over cable.
Electrical connections:
1 = A+
2 = B-
3 = GND
4 = Connector to RS485 port (option)
5 = Not used
NOTE:
one twisted pair of shielded cable is user scope
Port settings:
Baud Rate: 19200
Data bits: 8
Parity: Even
Stop bits: 1
Slave ID: 1
Modbus slave specification:
•
The analysers are able to work as modbus slave using modbus
over RS485
•
data types (used in table below):
A ASCII characters
U 16 bit unsigned integer value (0…65535)
I 16 bit signed integer value (-32768...32767)
UL 32 bit unsigned integer value (0…4.294.967.295)
L 32 bit signed integer value (-
2.147.483.648…2.147.483.647)
F 32 bit floating point value (reads -1E38, when not availa-
ble)
-
