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Support Device

SIMATIC S7-1500 / 1200 / 400 / 300 Series

* You can scroll this table sideways.

Device symbol Comment
M (Memory)  
I (Input)  
Q (Output)  
PI (Peripheral Input) Read-Only
PQ (Peripheral Output)  
DB (Data Block)  
C (Counter) Read-Only
T (Timer) Read-Only

* An accessible range of the device depends on the setting of PLC.

SIMATIC S7-200 Series

* You can scroll this table sideways.

Device symbol Comment
M (Memory)  
I (Input)  
Q (Output)  
C (Counter) Read-Only
T (Timer) Read-Only
S (Sequence Control Relay)  
SM (Special Memory)  
V (Variable)  
AI (Analog Input) Read-Only
AQ (Analog Output)  
HC (High-speed Counter) Read-Only

* An accessible range of the device depends on the setting of PLC.