Siemens Simatic S7-1500 - Page 292

Instructions
9.1 PID_Compact
PID control
292 Function Manual, 03/2017, A5E35300227-AC
Tag
Data type
Default
Description
sRet.r_Ctrl_Ti REAL 20.0
• r_Ctrl_Ti > 0.0: Active integral action time
• r_Ctrl_Ti = 0.0: Integral action is deactivated
r_Ctrl_Ti is retentive.
sRet.r_Ctrl_Td REAL 0.0
• r_Ctrl_Td > 0.0: Active derivative action time
• r_Ctrl_Td = 0.0: Derivative action is deactivated
r_Ctrl_Td is retentive.
sRet.r_Ctrl_A REAL 0.0 Active derivative delay coefficient
r_Ctrl_A is retentive.
sRet.r_Ctrl_B REAL 0.0 Active proportional action weighting
r_Ctrl_B is retentive.
sRet.r_Ctrl_C REAL 0.0 Active derivative action weighting
r_Ctrl_C is retentive.
sRet.r_Ctrl_Cycle REAL 1.0 Active sampling time of the PID algorithm
r_Ctrl_Cycle is calculated during tuning and rounded
to an integer multiple of r_Cycle.
r_Ctrl_Cycle is used as time period of the pulse width
modulation.
r_Ctrl_Cycle is retentive.
Note
Change the tags listed in this table in "Inactive" mode to prevent malfunction
of the PID
controller. "Inactive" mode is forced by setting the "sRet.i_Mode" tag to "0".
See also
Downloading technology objects to device (Page 44)