VAT 642 Series - Communication and Timing between Master (PLC) and Slave (VAT-Valve)

INSTALLATION Series
642
70/107 Edition 2017-11-24 813316EB
4.9.3 Communication and timing between Master (PLC) and Slave (VAT-Valve)
See chapter: «OUTPUT Buffer» > «PING PONG TX-BIT» and «INPUT Buffer» > «PING PONG RX-BIT».
For visual overview see the diagram below.
Fieldbus
Fieldbus buffer
Microcontroller
Ping Pong Rx = Ping Pong
Tx inverted
Slave =
VAT-
Valve
PLC
Check if
Ping pong Rx = Ping Pong Tx
inverted
Fieldbus buffer
MASTER
= PLC
Ping PongTx-bit
Ping PongTx-bit
Ping PongTx-bit
Ping Pong Rx-bit
Ping Pong Rx-bit
Ping Pong Rx-bit
output input
output input
Slave intern
Master intern