FEC AFC1500 User Manual

Page 30

Output Signals (Connector PLC2)
The Multi Unit is capable of providing over 570 Output signals to indicate the
status of the Multi Unit and of all the AFC1500 SAN Controllers connected to
it (up to 31 controllers). These signals are user configurable using the AFC
User Console Software and may be programmed on any designated pin. Up to
8 separate output data “Banks” can be setup, each with 32 different output
signals. The Output “Bank” is then selected using the Data Select inputs.
(Data Sel 0, Data Sel 1, Data Sel 2) (The output setup listed above is an FEC
default setting)

Bank Select Outputs
When working with the Discrete I/O interface, the output signals are
programmed into “Banks” of 32 output signals in up to 8 output “Banks”
(Max. 256 outputs). If the required output signals from the Multi Unit exceeds
32 signals, then Bank 2 can be programmed with additional signals. If over 64
signals are required, Bank 3 can be programmed and so on. These Output
“Banks” can then be selected by the Data Select input signals. The Data Select
input signals 0, 1 & 2 together form a binary code to select up to eight (8)
different Data Banks. (See Chapter 4 for Bank Select Procedure)

Note: Bank Select inputs do not function with any interface except the
Discrete I/O interface. When using Bank selects, it is recommended that the
bank number be monitored to confirm actual output status of shared discrete
output points. This can be performed by using the “Always On/Off” bits
set-up in specific discrete output points when programming the output points
with the AFC User Console Software. For this function, program the “Always
On/Off” bits to mimic the Data Select input bits. “Always On” bits will turn
on the output in that particular Bank as soon as the bank is selected. “Always
Off” bits will turn off the output in the particular Bank which is selected.
Using different combinations of these bits programmed in a output in each
Bank will allow monitoring of which Bank is selected.
The number of discrete outputs used for this function depends on how many
Banks are required as shown below;

5-8

2-4

0 or 1

Number of Discrete Outputs Required

Number of Banks Required

Typically these “Always On / Off” bits are programmed in the last output
points (Pins 30 -32 as shown on previous page).

Chapter 3: Control Interfaces