Analogue field programmer 1700 951 018: setting start and end
After analogue sensors are fitted, electrical zero and mechanical zero often disagree. Germanjet's Series 19 analogue programmer 1700 951 018 sets start and end on the sensor, anywhere within the factory stroke. It does not edit the PLC scale instruction.
What the programmer changes versus the PLC
| Programmer 1700 951 018 | PLC two-point | |
|---|---|---|
| Where | Sensor internal zero / end | Controller scale: Slope, Datum or SCALE limits |
| Applies to | Series 19 analogue (190 / 191 …) | Any analogue, including 12 / 16 / 18 |
| Typical use | Sensor should already output 4–20 mA over the mechanical stroke | Keep factory-wide span; align in the PLC |
Two-point formula and the 0.2 V / 9.5 V example: zero calibration. 191 wiring: Series 191 analogue.
Site order
- Fix end-stops, magnet and wiring first.
- Change either the sensor or the PLC, not both at once.
- With the programmer: set zero at mechanical start, full scale at mechanical end, inside factory stroke.
- Check 10% / 50% / 90%. Large mid error means the two span points were wrong, not that zero needs another tweak.
Factory analogue is slightly wider than nominal stroke, so the machine must be calibrated after installation — programmer or PLC.
When not to use this programmer
- Fieldbus and SSI (162 / 192): zero lives in the object dictionary or master, not this analogue box.
- Series 12 / 16 / 18 analogue: PLC two-point, see n117.
- Profibus slave address: a different tool (1700 951 032), not 1700 951 018.
Frequently Asked Questions
Q: Can 1700 951 018 set zero on Series 16?
It is the Series 19 analogue field programmer. Series 12 / 16 / 18 analogue use PLC two-point calibration.
Q: May I use the programmer and PLC scaling together?
One after the other, not both at once. Fix one end, verify three points, then touch the other.
Q: What if mechanical stroke exceeds factory stroke?
The programmer only sets zero and end inside the factory nominal stroke. Lengthen the ordered stroke or the stops — do not force-extend.
Q: Is this the same as the SSI display module?
No. 1700 951 018 is analogue start/end only.
