Saia PCD2.H310, Руководство пользователя

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PCD2.H31x Security aspects
26/762 E2
(2H3-11-E.DOC)

SAIA-Burgess Electronics Ltd. Page 11-1
11. Security aspects
If a drive unit is triggered with a PCD2.H31x module, particular attention
should be paid to the following points:
Drive power-up phase
When the main supply for the PCD has been switched on, it takes max. 2
seconds before all input/output modules are initialized, the CPU is in
RUN and the user program can therefore be processed.
During this power-up phase (max. 2 seconds), the analogue controller
output of the H3 module have any value between -10V and +l0V. For this
reason it is absolutely necessary that the power section of the drive
should either be switched on or released by the user program through a
digital output. This guarantees that the drive does not proceed out of
control during this power-up phase.
Monitoring the position error
(See flag 'fPosErr_x')
Exceeding the permitted position error signals serious problems and
should therefore always be monitored.
The following causes can result in exceeding the position error:
1. Connection fault in the H3 installation.
Examples: - loose connection
- directional mismatch in rotation of motor and
incremental shaft encoder.
2. Badly adjusted PID parameters
3. The size of drive (amplifier and/or motor) is not strong enough.
4. Wrong choice of motion parameters. The servo-amplifier or motor
cannot follow the acceleration or velocity ordered by the H3 module.
5. Blocked rotor in servomotor due to mechanical problems.
6. Hardware error in H3 module (e.g. faulty analogue controller output).
7. Hardware error in servo-amplifier.
If points 1 to 4 account for the position error being exceeded, this is usually
discovered during commissioning and can be remedied immediately.