7ML19981DP02
External Modem Kit – INSTRUCTION MANUAL
Page 15
Wiring Diagram for Connection to AiRanger with SmartLinx® Modbus RTU card
1.
Connect the communication cable to the AiRanger as follows:
EnviroRanger ERS 500
Port 3 set-up parameters:
*(3) refers to the primary index (secondary index 0).
Parameter
Description
P770 (3) = 3*
Modbus RTU slave
P771 (3) = 1
Modbus slave address of 1
P772 (3) = 9.6
9600 baud
P773 (3) = 0
no parity
P774 (3) = 8
8 data bits
P775 (3) = 1
1 stop bit
P776 (3) = 0
no flow control
P777 (3) = 0
no key-up delay
P778 (3) = 1
modem attached
P779 (3) = 300
modem inactivity timeout = 300
3
B
GND
RS-485 MODEM
TERMINAL BLOCK
AIRANGER WITH
SMARTLINX MODBUS RTU CARD
(MULTI-DROP APPLICATIONS)
TM
GND
TD +
4
A
TD -
5
6
6
5
4
Siemens Hardware