BusWorks®
961/962PB Module User’s Manual ProfiBus Differential I/V Input
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5. Apply the full-scale calibration signal (Cal Hi, see table) to the input to be
calibrated and allow the input to settle a few seconds.
6. Write FFH into the high-
order byte of the channel’s output word several
times to ensure transmission. In Configuration Mode, the module will
automatically calibrate the channel’s full-scale value when FFH is
detected. Then write 00H into the high-order byte to complete full-scale
calibration.
7. Repeat steps 3-6 for the other channels of the same range.
8. With user parameter bytes 0 & 1, select the next range to be calibrated.
Note (961PB):
The 4-20mA range is calibrated when the 0-20mA range
is calibrated and is not calibrated separately. All other ranges are
calibrated separately.
9. Repeat steps 3-7 for all channels of this range.
10. Repeat steps 8-9 until all input ranges have been calibrated.
11. When finished calibrating, use the master software to return the module
to the normal “Input Mode” to prevent miscalibration.
After completing calibration, the module should be reconfigured as
required and placed in the normal “Input Mode” configuration (I/O
configuration is 6 input words only). In general, your software allows you to
select the normal “Input Mode” configuration, and the slave will then be
taken off-line by the master and reconfigured. If reconfiguration is
successful, the slave module will pass to the data exchange state with a
normal I/O configuration.
CALIBRATION
