Appendix BSpecifications
182
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.
The following table shows the words allocated according to the I/O number. The 32-point Units are the
C200H-B7A12, C200H-B7A02, and C200H-B7A21. The 64-point Unit is the C200H-B7A22.
I/O No.
Words
32-point Units 64-point Unit
0 IR 030 and IR 031 IR 030 to IR 033
1 IR 032 and IR 033 IR 032 to IR 035
2 IR 034 and IR 035 IR 034 to IR 037
3 IR 036 and IR 037 IR 036 to IR 039
4 IR 038 and IR 039 IR 038 to IR 041
5 IR 040 and IR 041 IR 040 to IR 043
6 IR 042 and IR 043 IR 042 to IR 045
7 IR 044 and IR 045 IR 044 to IR 047
8 IR 046 and IR 047 IR 046 to IR 049
9 IR 048 and IR 049 Do not use.
Note 1. Be sure that the same words are not allocated to more than one Unit. For example, if you set a 64-point
Unit to I/O number 0, you cannot use I/O number 1 for any Unit.
2. The above words are also allocated to Group-2 High-density I/O Units. Be sure that the same words are
not allocated to more than one Unit.
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