YOKOGAWA F3LR02-0N, User Manual

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C4-16
IM 34M06H45-01E 7th Edition : Aug.30, 2019-00
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Module Recognition special registers
When a module installed in a main unit or subunit is recognized as accessible, the bit
corresponding to its slot position in the Module Recognition special registers is set to 1.
If a module cannot be read or written due to I/O module failure, subunit power failure or
some other reason, its corresponding bit in the Module Recognition special registers is
cleared to 0.
Table C4.14 Module Recognition Special Registers
Cateogry Module Recognition Special Registers
Number Name Description
Z41 Main unit
Z42
Subunit 1
Z43
Z44
Z45
Z46
Z47
Z48
0: No module is mounted
or mounted module does not allow read and write.
*1
1: Module is recognized as accessible.
*1
Slot
number
16 9 8 7 6 5 4 3 2 1
0 1
0 1 1 0 1 1 1 1
...
...
FC0462.VSD
Subunit 2
Subunit 3
Subunit 4
Subunit 5
Subunit 6
Subunit 7
*1: When this module (F3LR02-1W) installed in a main unit or subunit is recognized as accessible, the bit
corresponding to its slot position in the Module Recognition special registers is set to 1.
However a module cannot be read or written due to I/O module failure, subunit power failure or some
other reason, its corresponding bit of this module in the Module Recognition special registers is not cleared.
In situations where some subunits are turned on after the main unit, by checking the
Module Recognition special registers, a program can perform initialization setup of an
advanced function module installed in a subunit without waiting for the entire system to
be powered up.
Sample Program:
This sample program copies the Module Recognition special register for subunit 1 to an
internal relay, and performs initialization of the module installed in slot 1 after it is
recognized as accessible.
501
101
I00001
WRITE $C000 1
FB0463.VSD
0002
Z00042
MOV
M00033
I00001
0001

Figure C4.8 Sample Program Illustrating the Use of the Module Recognition Special Registers