Accessing Command Interface; Using Bfm - Pepperl+Fuchs CC-LINK Series Compact Manual

CC-Link Gateways

Accessing command interface

7. Accessing command interface
7.1

Using BFM

This example describes one method of accessing a command interface when it is
mapped into the cyclic buffer memory area (when using VBG-CCL-G4F Mode, or
CC-Link V1 Mode)
BFM used for I/O data
(RY4 = 0)
Disable BFM
(set RY5 = 1)
Wait for BFM disable
acknowledge (RX5 = 1)
Switch to mailbox mode
(set RY4 = 1)
Wait for mailbox mode
acknowledge (RX4 = 1)
Write command interface request data
(including command and changed
toggle bit) to RWw area
Enable BFM
(set RY5 = 0)
Wait for BFM enable
acknowledge (RX5 = 0)
1
31