ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. C
7-18
· A hardware fault has been discovered by the diagnostic func-
tion on either the Type 316VC61a/316VC61b or 316EA62
unit.
To determine whether a set of settings has been downloaded to
the equipment, connect it to a PC and start the HMI. Check via
the menus ‘Editor’ and ‘Edit function parameters’ and ‘Edit hard-
ware functions’ whether functions have settings and whether the
hardware has been configured.
If the settings appear in order, check whether parameters or
functions have been entered which are not permitted by the
‘software key’.
Should it appear that there is a disagreement with the ‘software
key’, proceed as follows:
· Connect the equipment to a PC and start the HMI.
· Download a slightly changed set of settings to the equipment.
The HMI then compares the ‘software key’ with the pro-
grammed functions before it actually downloads the settings
and reports and error if they do not agree (EPLD error).
7.4.1.2. Human/machine interface
If communication between the protection equipment and the PC
this is not possible in spite of the fact that the stand-by LED is lit,
first check the serial interface connectors and connecting cable.
Where the connection appears to be in order, reboot the PC by
switching it off and on and then restart the HMI.
Should this also prove unsuccessful, restart the device either by
selecting the menu item ‘Warm start’ in the RESET menu on the
local control and display unit (see Section 5.13.8.6.) or by hold-
ing the reset button depressed until the stand-by LED (green)
starts to flash (about 10 seconds). This is a software restart,
which is equivalent to switching the auxiliary supply off and on.
In the event of a defect, send the diagnostic information ob-
tained via ‘List DiagInfo’ and ‘Get Hex Dump’ together with
the device settings to your local support centre.
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