Read/write function block data
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Table 69: Operand overview
Table 70: Index 0: Bit IO
Index
(hex)
Operand Read Write
00 Bit IO, J Table 70 ×
01 Mode/Parameter – –
02 Upper setpoint SH × c
1
03 Lower setpoint SL × c
1
04 Actual value in Run
mode
QV ×
1) The value can only be written if it is assigned to a constant in
the program.
J
The data for index 2 to 4 is transferred as a 32-bit value in
Intel format (Data 1 – Low Byte to Data 4 – High Byte).
Bit 7 6 5 4 3 2 1 0
FB input Data 1 – – – – – – – EN
1
FB output Data 3 – – – – – ZE
2
FB
3
OF
4
1) Counter enable
2) Zero: Status 1 if the value of the function block output QV (the
counter status) equals zero
3) Fall below: Status 1 if the actual value lower setpoint
4) Overflow: Status 1 if the actual value upper setpoint
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