Primes PROFINET - Measuring Procedure Parallel-Interface

PowerMeasuringModule PMM
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Revision 13 EN - 02/2023
10.5 Measuring procedure parallel-interface
The measuring procedure of the PMM Parallel is identical to the procedures of the PMM PROFINET
®
/
PROFIBUS
®
. Due to a limited range of information, only the status bits as well as the result of the measure-
ment are transmitted via the interfaces.
The status bits for input “XG1 In” can be found in Tab. 7.13 on page27, for output “XG2 Out” in Tab. 7.14
on page28.
Resetting the device
1. Check at output XG2 that „Measurement finished“ bit 15 is set to 1.
2. Apply a signal with a duration of min. 200ms to input XG1, bit 3 „Reset“.
 After the reset „Measurement finished“ bit 15 is set to 0.
 The status of the PMM can then be read at the output lines.
Opening the shutter
3. Apply a signal to input XG1, bit 0 „Shutter opening“.
This signal has to be reset to 0 again after the signal at output XG2, bit 9 “Confirmation command clos-
ing” is set.
 The open shutter is indicated at output XG2, bit 0 „Shutter is open“.
Checking the temperature of the absorber
If the temperature of the absorber is too high, output XG2 bit 11 “Absorber to warm” is set to 1.
This bit is only set if the max. absorber capacity has been reached. This bit is reset due to thermal conduc-
tion.
Starting the measurement
A measurement may only be performed with the shutter open and sufficient absorber capacity.
NOTICE
Damage/Destruction of the device
The permissible temperature of the absorber must not be exceeded.

When programming the laser system, please ensure that no measurement can be started, as
long as the absorber is too warm (bit11 = 1, see section “Checking the temperature of the
absorber”).
4. Apply a signal to input XG1, bit 2 “Start measurement”.
This signal has to be reset to 0 again after the signal at output XG2, bit 10 “Confirmation start measure-
ment” is set.
 With the signal at output XG2, bit 14 „System waiting for pulse“, the PMM indicates readiness for mea-
surement.
5. Activating the laser pulse
The absorber capacity of the PMM is max. 3500J. The pulse should contain at least 400J.
Example: For a laser power of 4 000 W, the pulse length should be at least 400 : 4 000 = 0.1s.
The irradiation time does not have to be communicated to the system because the PMM measures it itself.
 After the laser pulse has been triggered, after a few 100ms, output XG2, bit13 „Measurement in pro-
cess, Pulse received“ is set to 1.
Waiting for the measurement result
Ten seconds after activating the signal at output XG2, bit 13 “Measurement in process, Pulse received“”, the
bit is reset and bit 15 “Measurement finished” is set to 1.
Simultaneously, the bits 0 to 14 show the measurement result in binary form.