Siemens SIMATIC S5 Manual page 296

STEP 5 Programming
Flag
F 5.0 Auxiliary initialization flag
F 6.0 START
F 6.1 STOP
F 6.2 FORWARD
F 6.3 REVERSE
F 6.4 TRANSFER
F 6.5
F 6.6
F 6.7
9-8
Function
IP 266
Remarks
FB 6 is transferred to byte 1
of the output message (QB 65
in the example). Before FB 6 is
transferred to QB 65, the
TOGGLE bit must be pro-
grammed in F 6.7.
EWA 4NEB 812 6057-02