AH500 Module Manual
9-16
Example:
Suppose the first special module at the right side of the CPU module is AH10/15EN-5A. When X0.0
is switched from OFF to ON, the instruction FROM is executed. The operation mode stored in CR#3
in AH10/15EN-5A is read into D100. Owing to the fact that no error occurs, the code stored in D110
is 16#0000.
The use of the parameters:
The module is placed on the main rack. Therefore, the rack code stored in D40 is 16#0001.
The module is inserted in the first slot. Therefore, the slot code stored in D41 is 16#0000.
The operation mode is stored in CR#3. Therefore, the control register number stored in D42 is
16#0003.
Owing to the fact that the operation mode occupies one register, the value in D43 is 1.
The data which is read from CR#3 is stored in D100.
Additional remark:
1. If the values in m
1
and m
2
exceed the range, the operation error occurs, the instruction is not
executed, SM0 is ON, and the error code in SR0 is 16#2003.
2. If D
1
~D
1
+n-1 exceed the device range, the instruction is not executed, SM0 is ON, and the
error code in SR0 is 16#2003.
3. If the value in n exceeds the range, the operation error occurs, the instruction is not executed,
SM0 is ON, and the error code in SR0 is 16#200B.
4. Due to the fact that the use of the instruction FROM decreases the execution efficiency of the
CPU module and that of the I/O module, users should use it less often.
5. The descriptions of the error codes:
Error code Description
16#2003
Please refer to point 1 and point 2 in the
additional remark.
16#200B
Please refer to point 3 in the additional
remark.
16#1400
An error occurs when the data is accessed
through the auxiliary processor.
16#1401
An error occurs when the data in the I/O
module is accessed.
16#1402
The arrangement of the I/O modules is not
consistent with the module table.
16#1407
A communication error occurs when the
data is accessed through the auxiliary
processor.
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