Appendix BSpecifications
197
DIP switch
Used to set the transmission delay,
transmission error processing mode, in-
put mode, and ERROR indicator opera-
tion.
Back
Indicator Operation
The indicators depend on the model of B7A Interface Unit, as shown below.
Name Color Function
ERROR 1
ERROR 2
ERROR
Input
transmission
error
Red Lights when an error occurs in transmissions from an Input B7A Link Terminal.
For the B7A12/22, ERROR 1 is for the first word allocated to the B7A Interface
Unit; ERROR 2 is for the second word.
3ms Transmission
delay setting
Orange Lit when the transmission delay is set to the high-speed setting (3 ms).
Not lit when the transmission delay is set to the standard setting (19.2 ms).
LOAD OFF Transmission
error process
Orange Lit when the processing for transmission errors is set to reset input status.
Not lit when the processing for transmission errors is set to hold input status.
15IN+ERR Input mode
setting
Orange Lit when the input mode mode is set to use 15 inputs and 1 error input.
Not lit when the input mode mode is set to use 16 inputs.
I/O Number Setting
The setting of the I/O number determines the words allocated to the Interface Unit. Set the I/O number to between
0 and 9.
Setting in direction
of notch
Note 1. Turn off the power supply to the PC before changing the I/O number setting. Any new setting will not be
effective until the next time the power supply is turned on.
2. Use a flat-blade screw driver to change the I/O number setting. Be careful not to leave the switch halfway
between settings and be careful not to damage the switch.
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