3 DEVICES
3.7 Device Setting
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• If the number of user devices used is changed, the change will be valid when power supply of the Multiple
CPU system is turned ON, or when reset.
• If changing the number of user devices used, ensure that the Multiple CPU refresh range and latch range do
not lie outside the range for the number of devices. If the relevant device range is exceeded, data may be
written to another device, or an error may occur.
User device memory capacity
Set user devices so that they satisfy the following formula.
(Bit device capacity) + (word device capacity) 128k words
■Bit devices
For bit devices, 16 points are calculated as 1 word.
■Word devices
For data registers (D), link registers (W), and Motion registers (#), 16 points are calculated as 16 words.
Device allocation examples
An example of device point allocation is shown below.
For Q series Motion compatible device assignment
Device name Symbol Number
base
Device points Limit check
Points Setting range Capacity (words)
Bit devices Input X Hexadecimal 12k (12288) points X0 to X2FFF 16 768 words
Output Y Hexadecimal 12k (12288) points Y0 to Y2FFF 16 768 words
Internal relay M Decimal. 16k (16384) points M0 to M16383 16 1024 words
Link relay B Hexadecimal 1k (1024) points B0 to B03FF 16 64 words
Annunciator F Decimal. 4k (4096) points F0 to F4095 16 256 words
Word devices Data register D Decimal. 22k (22528) points D0 to D22527 1 22528 words
Link register W Hexadecimal 5k (5120) points W0 to W13FF 1 5120 words
Motion register # Decimal. 15k (15360) points #0 to #15359 1 15360 words
Device total 45888 words (131072 words or less)
(Bit device capacity) =
16
(words)
(X+Y+M+B+F)
(Word device capacity) =
16
(D+W+#)
×
16 (words)
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