Functions
8.12 PID Controller
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
8-55
Description
Similar to the fixed frequencies, the PID controller has separate programmable PID fixed
setpoints (PID-FF). The values are defined using parameters P2201 … P2215 and are
selected and combined using binector inputs P2220 … P2223. The selected PID fixed
setpoint is available using connector output r2224 where it can be further processed (e.g. as
PID main setpoint → P2253 = 2224).
Two modes are available to select the PID fixed setpoints, similar to the fixed frequencies.
They are set via parameter P2216:
● Direct selection (P2216 = 1)
● Binary-coded selection (P2216 = 2)
The fixed frequency status bit r2225 (binector output) allows to combine the two selection
modes for fixed frequencies with an ON command. For this, P0840 should be set to 2225.
Please note that the meaning of P0840 may change with using the 2/3 wire functionality.
All logical connections are like the connections with fixed frequencies and for each selection
mode there are the two connection methods:
● Standard method
● BICO method
Note
The standard method has priority over the BICO method.
Direct selection (P2216 = 1)
Table 8-22 Example of direct selection using digital inputs
FF number Frequency P2223 P2222 P2221 P2220
PID-FF0 0 Hz 0 0 0 0
PID-FF1 P2201 0 0 0 1
PID-FF2 P2202 0 0 1 0
PID-FF3 P2203 0 1 0 0
PID-FF4 P2204 1 0 0 0
PID-(FF1+FF2) 0 0 1 1
PID-(FF1+FF2+FF3) 0 1 1 1
PID-(FF1+FF2+FF3+FF4) 1 1 1 1
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