Maple Systems OIT Family - Manual (Page 25)

Function Key Coil Example
If you want a motor to run whenever the F1 function key is being pressed by the operator,
the relay ladder logic could be the following:
In this case, internal control relay C389 has been configured as the Function Key coil for
the F1 function key. If the F1 function key has been configured as momentary, then C389
will be activated as long as the F1 function key is being pressed by the operator. Internal
control relay C389 is controlling output coil Y33 which is controlling a motor.
Consequently, the motor runs whenever the operator is pressing the F1 function key.
Status Coils
The Status coils are a block of discrete coils in the PLC that are used by the OIT to
communicate information to the PLC. All of the Status coils are optional and none of
them are required for the PLC to request screens. In order to use the Status coils, a
starting PLC address must be configured in the OIT - Controller Settings dialog box in
OITware-200 (from the Configuration menu, choose Controller Settings).
NOTE:In the OIT3100 and OIT4100 Series, the Status coils can be disabled (from the
Configuration menu, choose Controller Settings).
Status Coil Address (offset) Name
+0 . . . . . . . . . . . . . . . . . . Message Received bit
+1 . . . . . . . . . . . . . . . . . . Invalid Display Message Number bit
+2 . . . . . . . . . . . . . . . . . . Message/Keytable Error bit
+3 . . . . . . . . . . . . . . . . . . Reset bit
+4 . . . . . . . . . . . . . . . . . . Alarm Stack Full bit
+5 . . . . . . . . . . . . . . . . . . Message Stack Full bit
+6 . . . . . . . . . . . . . . . . . . Message Stack Empty bit
+7 . . . . . . . . . . . . . . . . . . Clear Alarm bit
+8 . . . . . . . . . . . . . . . . . . Clear Alarm Stack bit
+9 . . . . . . . . . . . . . . . . . . OIT Pulse bit
+10 . . . . . . . . . . . . . . . . . Update PLC Clock bit
+11 . . . . . . . . . . . . . . . . . Alarm Stack Empty bit
+12 . . . . . . . . . . . . . . . . . Acknowledge Alarm bit
+13 . . . . . . . . . . . . . . . . . Reserved for future use
+14 . . . . . . . . . . . . . . . . . Reserved for future use
+15 . . . . . . . . . . . . . . . . . Reserved for future use
Operational Overview 25
1010-0099, Rev. 07
C389 Y33