16 Warnings
It is essential that all the following warnings are read and understood.
2.4 Summary of further WARNINGS
This summary is provided for convenience only. Please read the entire manual prior to first time product use.
0V on T13 must be used for protective clean earth connection.
Terminals T30 and T36 must be linked if external over-temperature sensors are not used.
See 3.5 Control terminal default functions.
WARNING. Do not rely on any drive function to prevent the motor from operating when personnel are
undertaking maintenance, or when machine guards are open. Electronic control is not accepted by safety
codes to be the sole means of inhibition of the controller. Always i solate the power source before working on
the drive or the motor or load. See 3.5 Control terminal default functions.
The CSTOP must be high for at least 50mS prior to START going high.
See 3.5 Control terminal default functions.
Contactor coils usually have a high inductance. When the contactor is de-energised it can produce high
energy arcing on the internal PL/X control relay. This may degrade the life of the relay and/or pr oduce
excessive EMC emissions. Ensure that the contactor coil is snubbered. Refer to contactor supplier for detai ls.
See 4.2 Main Contactor operation.
The essential elements of controlling the contactor are as follows.
1) It must be possible to re lease the contactor without relying on electronic s.
2) The contactor must not break current. To obey this rule the foll owing applies:-
a) The PL/X must not attempt to deliver armature current until after the contactor has closed.
b) The armature current must be brought to zero before the contactor has opened.
3) The contactor control circuit must be compatible with all likely application requirements.
Follow the instructions and all the above requirements are under the control of the PL/X automatically.
See 4.2 Main Contactor operation.
It may be necessary for i nstallations to have over-riding external independent systems for de-energisi ng the
main contactor. In this case it is recommended that the CSTOP terminal be opened 100mS in advance of the
main contacts opening. Failure to achieve this may result in damage to the unit.
Note. If the use rs main contactor has a closing time delay of greater than 75mS, then it is essential that
steps are taken to delay the release of armature current until the mai n contact has closed.
1) Insert an auxiliary normally open contact on the main contactor in series with the RUN input on T31.
2) Alternatively use contactor wiring method shown in 4.3.2. See 4.2 Main Contactor operation.
It is dangerous to utilise a DC contactor when field weakening is employed without also connecting T41 and
T43 to the motor armature. This ensures that the PL/X can measure the armature voltage even when the
contactor is open. See 4.3.3 Main contactor isolating DC armature.
This is a summary of the essential pa rameters that should be checked prior to allowing power to the motor.
You must be able to put a tick against every section. Failure to comply with these requirements may cause
incorrect functioning or da mage to the drive and/or installation and will invalidate any warranty.
See 4.4 ESSENTIAL pre-start checks.
All external fuses must be of the correct rating and type. The I
2
t r ating must be less than the rating specified
in the rating tables. This includes main and auxiliary fuses.
See 4.4 ESSENTIAL pre-start checks.
Check the 3 phase auxiliary supply phasing on ELl /2/3 equates to the phasing of the main stack supply on
Ll/2/3, and the 1 ph control supply on T52/53 is correct. See 4.4 ESSENTIAL pre-start checks.
Disconnect the drive for wiring tests usi ng a megger .
See 4.4 ESSENTIAL pre-start checks.
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