Fairbanks X SERIES PR 5410 Process Indicator - Manual (Page 40)

Section 3: Installing the Instrument and Plug-In Cards
10/08 40 51207 Revision 1
Output Modes
In all modes, data is output with each internal PLC cycle.
Mode 1 : Continuous data output (follow), no DATA_IN:
Continuous output of consistent data without request, e.g. for remote display.
- The driver modules are always enabled.
- PIN25 is output.
Mode 2: Data output on external request DATA_IN (hold):
Output of consistent data in "held" condition on request, otherwise continuous.
- As long as DATA_IN is active, the last output value remains held.
- The driver modules are always enabled.
- PIN25 DATA_IN is data-hold (level S101-3, polarity S101-4).
Note:
Data might be transferred internally (data modification) in the output memory at the same time the
external request signal changes from "Data hold" to "Data valid". In this case, the reading instrument
must wait 100 µs, until the data is considered valid.
Mode 3 : Parallel bus system (tristate), external request DATA_IN (hold):
Parallel connection of n PR 5510/09 cards, controlled via the DATA_IN (tristate/hold) input.
Output of the consistent data in "held" condition on request, otherwise tristate (high-impedance).
- As long as DATA_IN is active, the last output value remains held.
- The driver modules are enabled (not tristate) only, when DATA_In
(hold) is active.
- PIN25 DATA_IN is data-enable+hold (level S101-3, polarity S101-
4).
Mode 4 : Continuous single-bit output (23xDA), DATA_IN (1xDE):
Continuous bit output, continuous, without request (1xIN, 23xOUT, configurable).
- The driver modules are always enabled.
- PIN25 is input.
Mode 5 : Continuous single-bit output (24xDA), no DATA_IN:
Continuous bit output without request (24xOUT, configurable).
- The driver modules are always enabled.
- PIN25 is output.