Siemens 7MB1420, Instruction Manual, Page: 22 / 74

Function 44 must be parameterized for the slave. The slave can trigger the automatic calibration
procedure for a further analyzer at the end of its calibration etc.
An automatic calibration can be triggered at any time using function 40. Function 22 must not be
activated in this case. The time up to the next calibration is not influenced by this.
If function 22 is set to 0, this does not change the time up to the next calibration procedure.
In the event of a power failure, the time up to the commencement of the next calibration procedure
is shifted by the duration of the power failure. In the event of a longer failure, function 41 can be
used to correct the time up to the next “autocal”.
Function 47 can be used to omit up to 99 zero and sensitivity calibrations. The times of the zero and
sensitivity calibrations can be separated at position A (Fig. 7.1). This time consists of the time for
the sample gas purging (function 44, identifier 2) and the time for the actual sample gas mode
(function 47, identifier 1, max. 60 minutes). The signal contact “Measurement” is triggered during
this time, but not the signal contact “End of calibration procedure”.
Slave
11
13
12
9
10
Connections
Master
22