Pepperl+Fuchs 2/209, Руководство пользователя

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DO
CT
-194
6C
2018
-07
32
2903
Trip Amplifier 2/209
Software description
26
EN
4.2.14 Trip 2 of 3 selector
Example
SEL,E01,E02,E03,K01,K02,X01,X02,X03,X04
Normal operation
• signal alarm = -1
• channel alarm = -1
• average = (E1 + E2 + E3) / 3
• faulty channel = 0
Single fault
• signal alarm = 1
• channel alarm = -1
• average = (Ex + Ey) / 2
• faulty channel = E1 or E2 or E3
Multiple fault
• signal alarm = 1
• channel alarm = 1
• average = previous value
• faulty channel = 123
Three input signals op1, op2, op3 are monitored for equality. If one input leaves the
tolerance band op4 around the average of the signals, the signal alarm op6 will be
activated. If all inputs are different, the channel alarm op7 will be activated.
The faulty channel can be read in op9. Use the DISPLAY command to read the value in
the display in the front panel. The average op8 of those values which are within the
tolerance band can also be displayed. Variables op6, op7, op8, op9 must not be
overwritten during the remaining user program.
Call SEL,op1,op2,op3,op4,op5,op6,op7,op8,op9
SEL = select the deviating channel
op1 = input 1
op2 = input 2
op3 = input 3
op4 = tolerance band
op5 = tolerance band hysteresis
op6 = signal alarm -1, 0, 1 (channels are deviates)
op7 = channel alarm -1, 0, 1(channels are different)
op8 = average of acceptable inputs
op9 = faulty channel (0, 1, 2, 3, 123)
Formula op5 and op6 show:
op4= 1 for alarms or if op. was 1 before
op4 = 0 while inside deadband or if op. was 0 before
op4 = -1 when there is no alarm