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1.7.3 Memory area "digital inputs I"
This memory area “digital inputs I” is the area in which the state of digital
inputs is stored. It is organized in words; each of the 16 bits of the word
represents the state of an input. For instance: the state of digital input I20 is
stored on bit no. 3 of word 2 in area I. The area consists of 4 words. The
first and the second are updated with actual state of inputs at the starting of
each cycle, while the last two words may contain the state of inputs read
via serial communication from an expansion module.
1.7.4 Memory area "digital outputs Q"
This memory area stores status of digital outputs. It is organized in words;
each of the 16 bits of the word represents the status of an output. Eg.: the
status of digital output Q1 is stored on bit no. 0 of word 1 into the area Q.
The area consists of 8 words. The first one is transferred to the outputs of
PL260 at the end of each cycle, the other ones may contain the status of
further outputs to write via serial communication to an expansion module.
1.7.5 Memory area "support marker M"
Memory area M contains the status of all markers (bit contacts) used into
the program. It is organized in words; each of 16 bits of the word means the
status of a marker. Eg.: status of marker M1 is stored on bit number 0 of
word 1 in the area M. The area is composed of 8 words.
1.7.6 Memory area "analogue inputs AI"
Into this memory area the PL260 stores the value which is measured on
the analogue inputs. This value is calculated according to min. and max.
limits which have been set as the range of the analogue input.
1.7.7 Memory area "analogue outputs AQ"
Memory area “analogue outputs AQ” is the memory where values for
analogue outputs are assigned. The percentage of analogue output will be
calculated starting from the entered value considering the range (min and
max) of analogue output.
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