Mitsubishi Electric MELSEC Q Series User Manual page 363

(4) Host station device access for network module
Create a user program to read/write data after ensuring the following conditions so that data reading/writing is
allowed.
If the following conditions are met, data become valid. However, reading/writing functions may complete normally
even when the conditions are not valid.
(a) CC-Link module
• Module error (Xn0) is off (normal)
• Module ready (XnF) is on (operable)
• Own data link status (Xn1) is on (in data link)
(b) MELSECNET/H module
• Module status (SB20) is off (normal)
• Baton pass status of host station (SB47) is off (normal)
• Data link status of host station (SB49) is off (in data link)
(c) Cc-link IE Controller Network Module/Cc-link IE Field Network Master/local Module
• Data link status of own station (SB49) is off (in data link)
• Cyclic transmission status (the bit corresponding to the communication targets in SWB0 to B7 which is
read from the own station) is off (normal)
CHAPTER 21 PROGRAMMING USING BUS INTERFACE FUNCTIONS
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