Installation, Operating & Maintenance Instructions
Series 650 DN 100-250 (I.D. 4“ - 10”), CC-Link
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 CH@vatvalve.com www.vatvalve.com
280672EB
2010-12-15
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3.11.4 CC-Link Handshaking
Before the CC-Link slave station (VAT valve) can be operated by the CC-Link Master (PLC), handshaking is necessary. If
the handshake is not done, no data from the master will be transmitted to station.
An indication of a successful handshaking is the bit «
FIELDBUS DATA VALID» (= 1) in the INPUT buffer > GENERAL STATUS.
The CC-Link “Network failure” is independent of the CC-Link handshaking. That means the “Network failure” is inactive if
the handshaking is not done yet.
Procedure:
1. If the network parameter are
correct the slave station will
set the bit ’Initial data
processing request flag’.
2. The master have to answer
the request with the bit ’Initial
data processing complete
flag’.
3. Now the station sets the bit
’Remote READY’. That
means the normal operation
mode.
Note: The Flag ‘Remote READY’ from slave station must be set for normal operation.
InitialDataProcessingRequest flag
InitialDataProcessingComplete flag
Master PLC
Master PLC Slave station
VAT Valve
Remote READY flag
Slave Station
VAT Valve
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