Mitsubishi Q2ACPU, User Manual

Page: 63 / 570

5.
5 - 4
I/O NUMBER ASSIGNMENT
5.3 I/O Assignment with GPP Function
When using the QnACPU, I/O modules and a special function module can be controlled
even if I/O assignment with GPP function is not performed.
I/O assignment with GPP function are valid in the following cases.
(1) The purpose of I/O assignment with GPP function
(a) When using a base unit for 5 slots, set 0 point for 3 slots for efficient use of
number of I/O points.
(b) Reserve the points when changing a module to other than a 16-point module for
future system extension.
(c) The I/O assignment prevents the I/O numbers from changing if an I/O module or
special function module that occupies other than 16 points has to be removed
due to failure.
(d) The I/O assignment reduces the I/O number modification in a program since it
enables to match with the I/O numbers of the designed program and to change
the I/O numbers assigned to each module on the base unit per slot.
(2) The concept of I/O assignment with GPP function
The following two methods are available for I/O assignment with GPP function.
1) Set the number of points for the empty slots on a main base and extension
base. (Points occupied by empty slot)
2) Set the I/O assignment per slot of main base unit or extension base unit to
each module type. (I/O assignment)
Parameter settings are used for both of these methods. If both 1) and 2) are set, the
setting of 2) takes priority.
(a) Setting points occupied by empty slot
Set the number of points for all slots that are empty on the base unit.
In the systems in which this setting is not made in the parameters, 16 points are
set for empty slots.
Make this setting in "7. # of empty slots" on the "PC system" screen in the
parameter mode.