Specifications

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Additional Functions Section 9-5
9.5 Additional Functions
In addition to the random write and read access to PLC variables, a memory area
comprising 12 bytes is specified in the mask definition as poll area. The location of
this memory area is specified in the mask definition.
Only marginal conditions regarding this memory area is that the PLC must be able
to access in bit-mode and the terminal in word-mode, and the memory area must
be contiguous. The address of this data area is defined in the application descrip-
tion.
The data area comprises a maximum of 6 words.
Example: The cyclic data area is set to N9:10 in the programming system
Word address High-byte Low-byte
Word address +0 N9:10 Write coordination byte Reserved
Word address +1 N9:11 Message channel high-byte Message channel
low-byte
Word address +2 N9:12 Function key LED 1 to 4 LED 5 to 8
Word address +3 N9:13 Function key LED 9 to 12 LED 13 to 16
Word address +4 N9:14 Function key LED 17 to 20 LED 21 to 24
Word address +5 N9:15 Function key LED 25 to 28 LED 29 to 32