Mitsubishi MELSEC-Q Series User Manual page 271

6
I/O NUMBER ASSIGNMENT
(2) Precautions for I/O assignment
(a) Slot status after I/O assignment
Mounted module
Input module
High-speed input module
Output module
I/O composite module
Input module
High-speed input module
I/O composite module
Output module
I/O composite module
Intelligent function module
Interrupt module
Empty slot
All modules
Other combinations
When I/O assignment settings have been made to a slot, that settings have
precedence over the mounted module.
1) When the preset number of points is less than the number of I/O points
of modules actually mounted
The I/O points for actually mounted modules are decreased.
For example, when a slot, to which a 32-point input module is installed, is set
as a 16-point input module in I/O assignment settings, the second half 16
points of the 32-point input module becomes invalid.
2) When the preset number of points is less than the number of mounted
intelligent function module points
An intelligent function module assignment error (error code: 2100, SP.UNIT
LAY ERR.) occurs.
3) When the preset number of points is greater than the number of I/O
points of modules actually mounted
The points in excess of the mounted module points are not used by the I/O
module.
4) Mounted module and assigned module types
The mounted module type and the set type in the I/O assignment settings
must be the same.
If not, normal operation will not be performed.
For intelligent function modules, make sure that the numbers of I/O points are
the same.
Table6.1 describes the operations performed when the mounted module type
differs from the one in the I/O assignment settings.
Table6.1 List of operations performed when mounted module differs from I/O assignment
I/O assignment
Intelli./Interrupt
Output
Input/Hi.Input
Input/Hi.Input
Output/I/O mix
Input/Hi.Input
Output/I/O mix
Intelli./Interrupt
Empty
6.6 I/O Assignment by C Controller Setting Utility
6.6.2 Details of I/O assignment by C Controller setting utility
setting
Intelligent function module assignment error
(error code: 2100, SP. UNIT LAY ERR.)
Input/Hi.Input/I/O mix
(Operates according to the type of the
mounted module.)
Output/I/O mix
(Operates according to the type of the
mounted module.)
Intelli. module assignment err. (error code:
2100, SP. UNIT LAY ERR.)
Empty slot
(All points turn OFF.)
Empty slot
(All points turn OFF.)
No error will occur but normal operation is
not performed.
Result
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