Within TM221Cxxx PLC and SoMachine/Machine Expert - Basic, we have the possibility to add 1 or 2 optional cartridges (depending on the TM221Cxxx PLC reference). Such cartridge provides 2 analog inputs or outputs channels as extension for the M221 PLC local I/Os.

For each channel, it exists a dedicated system word object available for diagnostic .
It’s  %IWS.0.i  for an analog input channel
It’s %QWS.0.i  for an analog output channel

With i defined by this way:
i=100  for  the 1^st channel of the cartridge located 1^st slot
i=101  for  the 2^nd channel of the cartridge located  1^st slot
i=200  for  the 1^st channel of the cartridge located 2^nd slot
i=201  for  the 2^nd channel of the cartridge located 2^nd slot

The definition of the code status/diagnostic value is as below:

For %IWS word content definition

0	Normal
1	Data conversion in progress
2	Initialization in progress
3	Input operation setting error or module without input
4	not used
5	High limit  reached
6	Low limit reached
7	Non-volatile memory error

For %QWS word content definition

0	Normal state
1	not used
2	Initialization in progress( after power on)
3	Output operation setting error or module without output
4	not used
5	not used
6	not used
7	Non-volatile memory error

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