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Operating The PM295
Each sub-menu uses three windows: the upper window lists sub-menu entries, two
others indicate the allocation status of the eight discrete inputs for the selected input
group. Discrete inputs are numbered from the left to right: inputs #1 through #4 - in
the central window, and inputs #5 through #8 - in the lower window. The input state
of 0 indicates that the input is not allocated, and the state of 1 - that the input is
allocated to the group. Each discrete input can be allocated individually. For
information on discrete input operation, refer to
Section 4.8
.
To select and view an allocation group setup:
Ä
From the upper window, scroll through sub-menus with the up/down arrow keys
until the label of the desired entry appears.
To change the discrete input allocation:
Ä
Press
SELECT
to choose the desired discrete input.
Ä
Set the input allocation status with the up/down arrow keys.
Ä
Press
ENTER
to return to the upper window.
To quit the menu:
Ä
From the upper window, press
ENTER
to return to the
MAIN
menu.
The illustrations above show an example of discrete inputs
allocation. Here, inputs
1-5 are allocated as status inputs, and inputs 7-8 are allocated as pulse inputs.
Status inputs 1-2 are allocated to the 4-channel multiplexed analog output selector,
and pulse input 8 is allocated for sensing the external synchronization
pulse to use
as a reference for demand interval measurements.
TROUBLESHOOTING
If your setting is not accepted by the instrument, one of the following might be the
cause:
•
Make sure the status inputs and pulse inputs are not overlapping.
•
If you are allocating inputs for the analog output selector, check whether they
were allocated as status inputs.
•
If you are trying to allocate input for the external synchronization pulse, check
whether it was allocated as a pulse input.
NOTE
In the event that you re-allocate the discrete input allocated previously to the
analog output selector or external synchronization pulse, the prior allocation will be
automatically disabled.