Programming Example - Pepperl+Fuchs 1/209 Handbuch

Trip Amplifier 1/209
Software Description
4.6

Programming Example

A temperature signal of 0 to 100 °C is converted into 4 ... 20 mA by a transmitter.
The trip amplifier 1/209 has the task to monitor the signal for a low trip of 30 °C and a high
trip of 70 °C. The transmitter output is applied to input 1 of the trip amp. Relay 1 is to
deenergize for values below the low trip point. Relay 2 is to deenergize for values above
the high trip point.
The program recognizes constants which are stored in EEPROM and variables stored in
RAM. Programming commands are also stored in non volatile EEPROM.
Program the following values:
• constant K01 = 0
• constant K02 = 10
• constant K03 = 30
• constant K04 = 70
• constant K05 = 1
• variable X01
• variable X11
• variable X12
Display input 1 in engineering units. Use push button 1 to step through the list of display
parameters:
• DSP, X01, Z00, „E01"
• DSP, K03, Z02, „L01"
• DSP, K04, 202, „H01"
• DSP, K05, Z03, „X01"
Convert the live-zero input (AE1 = 0 ... 1) into engineering units (K01 ... K02 = 0 ... 100).
Store the result in X01:
• CLI, AE1, K01, K02, X01
Monitor input (X1) for a low trip (K3) employing (K5) as a deadband. Store the result in
X11:
X11: -1 = o.k. 0 = hyst. 1 = alarm:
• ALM, X1, K3, K5, X11
Transfer the result of the monitoring function (X11) to relay 1 using the normally energized
mode.
• RE1, X11
Also transfer the result (X11) to LED 1:
• SL1, X11
Monitor input (X1) for a high trip (K4) employing (K5) as a deadband. Store the result in
X12:
• AHM, X1, K4, K5, X12
Transfer the result of the monitoring function (X12) to relay 2 using the normally energized
mode:
• RE2, X12
84
beginning of temperature range
full scale value for the temperature
low trip point
high trip point
hysteresis
measured value of input 1
status of relay 1
status of relay 2
input E01
low trip L01
high trip H01
hysteresis X01