9
DEVICE EXPLANATION
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9.2 Internal User Devices
9.2 Internal User Devices
(1) Definition
Internal user devices can be used for various user applications.
The "number of usable points" setting is designated in advance (default value) for
internal user devices.
However, this setting can be changed at the "Device" tab screen in the "(PLC)
Parameter" dialog box.
(2) Internal user device setting range
The number of used internal user devices other than the input (X), output (Y), step
relay (S), link special relay (SB) and link special register (SW) of the CPU module can
be changed within the following range in the device setting of the PLC parameter
dialog box. (Table9.3)
The following gives more information.
(a) Setting range
The number of device points is designated in 16-point units.
A maximum of 32 k points can be designated for one device.
1 point is calculated as 2 points (1 for coil, 1 for contact) for the timer, retentive
timer, and counter.
Diagram 9.1 Device in PLC parameter dialog box
Table9.3 Internal user device setting range
CPU module Changeable range
Basic model QCPU
16.4k words
(Including 1.5k words for the above devices)
High Performance model QCPU
Process CPU
Redundant CPU
29k words
(Including 3.7k words for the above devices)
Default value
For device whose number of
points can be changed, number
of used points can be changed.
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