Mitsubishi Electric MELSEC Q Series User Manual page 304

(a) Points
When I/O assignment is set for a slot, the setting has priority over the actual module-mounting status.
The number of points of the mounted module is applied to a slot without any specified number of points.
However, the empty slot is assigned the number of points set in System settings.
● When setting the number of I/O points less than that of mounted I/O modules
The available number of I/O points for the mounted I/O modules will be reduced. When the number of I/O points is set to
16 points in the I/O Assignment tab of the PLC parameter dialog box for the slot where a 32-point input module is
mounted, the second half 16 points of the module becomes unavailable.
● When setting the number of I/O points less than that of mounted intelligent function module
An error (error code: 2100, SP.UNIT LAY ERR.) occurs.
● When setting the number of I/O points exceeding that of mounted I/O modules
The exceeded number of points will not be used in the I/O modules.
● When setting 0 points for empty slots
Setting "Empty" for Type and "0 Point" for Points even occupies one slot. To set slots after the specific slot number
unoccupied, set the number of slots in detail mode.
(b) Start XY
When changing I/O numbers of each slot, enter a new start I/O number.
When I/O assignment is set for a slot, the setting has priority over the actual module-mounting status.
To the slot with no start X/Y setting, I/O numbers following those of the configured slot are assigned in order.
For the I/O assignment settings, set the last I/O number to be within the maximum number of I/O points (FFF
If it exceeds the maximum number of I/O points (FFF
(c) Type
The type set in the I/O Assignment tab must be the same as that of the mounted module.
Setting a different type may cause incorrect operation. For an intelligent function module, the number of I/O
points must also be the same to the I/O assignment setting.
The following table lists the operations when the mounted module type differs from the one set in the I/O
Assignment tab.
Mounted module
Input module,
Output module,
I/O combined module
Intelligent function module
Empty slot
All modules
Other combinations
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), an error (error code: 2124, SP.UNIT LAY ERR.) occurs.
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I/O assignment setting
• Intelli.
• Interrupt
• Input
• Hi. Input
• Output
• I/O Mix
• Input
• Hi. Input
• Output
• I/O Mix
• Intelli.
• Interrupt
• Empty
-
Result
Error (error code:2100, SP.UNIT LAY ERR.)
Empty slot
Incorrect operation may be caused, no error occurrence.
Or, error (error code: 3000, PARAMETER ERROR)
).
H