XS series operating manual
XS user manual v0.55 - 95 -
Measurement discharge cycle
Warning :
The PLC function must be selected in the configuration menu (line INTERFACE : PLC).
To take the control of the unit, you must be on the initialization screen.
If not, you will have the DIALOG ERROR : <2> message displayed.
Note : For DXS models in sequence mode, the control is taken from the measurement screen of
the first sequence function.
To do a measurement :
CTRLIN must be on high logical state,
For the DXS models, the programmable logic controller must select a measurement function
(Megohmmeter or dielectric strength test). For the other models it is advised to let the TYPE
line not connected.
The programmable logic controller has to select a number of parameters which will be binary
coded with N0 to N3 bits (N0 is the least significant bit and N3 is the mot significant bit).
To enter in measurement mode, a rising edge must be put on the MES_DCH line. The high
logical state must be set all during the measurement. Input states (CTRLIN, TYPE, N0, N1,
N2 et N3 ) are enabled only on a rising edge of MES_DCH.
Then the unit will do a measurement or, if parameters aren't correct, will give an error. The
CTRLOUT signal will appear at the first measurement and stay until a low logical state is set on
the CTRLIN. During measurement, the unit will send various signals according to the test
running and the selected parameters. Those parameters can be an error signal (ERROR), an
end of test signal (EOT), or a signal showing the test result (PASS or FAIL). Those signals are
active on a high logical state.
For the SXS models, the PLC function starts only a sequence.
For the DXS models the PLC function starts a measurement function or a sequence.
To force the unit to go in the discharge state, the programmable logic controller must set a low
logical state on the MES_DCH input.
To reset the unit to the local mode, the programmable logic controller can reset the CTRLIN signal
to release the CTRLOUT, then set the MES_DCH and reset it.( see diagram n°1)
Diagram n°1 : release of the CTRLOUT signal
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