Siemens SIMATIC S7-300 FM 350-1 Manual page 142

Operating Modes, parameters and commands
7.4 Measuring modes
Variable Values during Operation:
● Low limit (L_PREPAR)
● High limit (T_CMP_V1)
● Update time (T_CMP_V2)
● Function of digital output DO0 (C_DOPARA)
(See the sections Behavior of the Digital Outputs (Page 153) , Control interface for the
measuring modes (Page 62) and Checkback interface for the measuring modes (Page 65))
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FM 350-1 Counter module
Manual, 05/2011, A5E03648639-01