Mitsubishi Electric MELSEC-A Series Manual page 111

2
REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
2) Per-station block guarantee function
When the "interlock program using BW" in 1) cannot be made, use the per-station block
guarantee function for MELSECNET/H cyclic data. By enabling the per-station block guarantee
function, handshaking is performed between CPU modules and network modules to refresh the
network, and enables data separation prevention of cyclic data per station. The per-station block
guarantee function is enabled when "Secured data send" and "Secured data receive" in the
following parameters are set.
(b) BW first half/second half assignments in the MELSECNET II mode and composite mode
Set the station inherent parameters of the MELSECNET/H to all stations to re-use MELSECNET II
sequence programs more efficiently.
(c) Processing time
The link scan time and link refresh time differ between the A/AnS/QnA/QnAS series and the Q series.
For details on processing times, refer to the manual for the respective module.
2
- 74