Installation and First Start-Up
- 16 -
GND
TEACH
Signal cable
red wire
4
1
2
5
3
GND
TEACH
Standard Connection option R5M0
8.4
Calibration of the Measuring Range
8.4.1
Calibration for Versions with CAN Interface
A hardware calibration as described in section
8.4.2 is not required for this version.
The calibration of the upper and lower set point is performed via the CANopen interface.
8.4.2
Calibration for Versions with Analog Output
REMARKS
The calibration must be performed for each newly installed MTM-A-000
measuring system before or during commissioning.
Even when replacing the measuring system or rod (e. g. in case of servicing)
a new calibration must be performed.
One second after power-up, the device is ready for operation. In
addition, the MTM-A-000 system with analog output offers the
possibility of initiating the learning process during the first ten
seconds after power-up. A lower and upper set point must be de-
fined for which the TEACH input is required.
Ideally, this input is - temporarily for the calibration procedure -
wired with a switch or push-button against GND (see figure).
To calibrate the set points, please proceed as follows:
Starting position = TEACH input is open resp. not activated.
Press the connected TEACH button.
During the first second of pressing, the LED changes rapidly between red and green.
a) Keep the button pressed within 1 … 3 seconds, until the LED lights statically green:
By releasing the button in the green phase, the learning of the lowest position (min) is initiated.
b) Keep the button pressed (max. 8 seconds), until the LED lights statically red:
By releasing the button in the red phase, the learning of the uppermost position (max) is initiated.
Outside these times, the learning process is interrupted.
8.4.2.1
Teach Set Point 1 (Min)
Move the round rod to the lower set point (e.g. zero point) and release the TEACH button during the green
phase.
3 x flashing, followed by 3 x pressing button
stores the lower set point.
This is confirmed by the LED with a single green hold for 1.5 seconds.
Set point 1 (Min position)
Figure 8: TEACH input wiring
