Host Link Commands clarification?

[skj1402]

My master T100 needs to control a number of contacts within my T100 slave unit and I understand that I would need to use the 'Write Relays' command to do this. Within this command is a Channel # identifer, each channel containing 8 bits (maybe you wouldn't mind providing an example showing how relays are addressed and then turned on and off by using this command?).

However, I also note that there is a 'Write Single I/O bit' command (Wb) contained in the E10 manual, that can write to an individual bit. This appears not to contain a channel # identifier; only a bit position identifier. Can I therefore assume that I can't use this command within a T100, and if I can, how would I address the channel #'s?

[support]

"Write Relay" command "WR" will write to the internal relay channels in the slave PLC. Each relay channel is 8 bit.

E.g. if you execute "@xxWR0055nn*'   where xx is the ID and nn is the FCS, what happens is that relay bit #1 to #8 will be turned ON alterately:

    RELAY  8 7 6 5 4 3 2 1
    binary 0 1 0 1 0 1 0 1   (HEX &H55)
   


If you execute "@xxWR01F0nn*'

    RELAY  16 15 14 13 12 11 10  9
    binary   1   1   1   1   0   0  0   0   (HEX &HF0)
   


Wb command is supported on M-series PLCs with firmware revision of r47 and above. You can view the command from the T100MD+ user manual:  

http://www.tri-plc.com/MD-man.pdf

Look for page 4-16.

[skj1402]

Thanks for those very useful examples. All is now made clear (except you got the Hex value equivalents the wrong way round.

As for the Wb command, this unfortunately wasn't contained in the blue User Guide manual that I received with my T100's, so thanks also for refering me to the updated version on your site, which I've swiftly printed out!!

[support]

Thanks. Somehow when I cut and paste over I changed the wrong part  Have corrected it in the last post to avoid confusing other readers.