Read/write function block data
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Table 73: Operand overview
0
Table 74: Index 0 – Bit IO
Index
(hex) Operand Value Read Write
00 Bit IO Table74 ×
01 Mode/Parameter – – –
02 Upper setpoint SH In integer range from
–2147483648 to +2147483647
×c1
03 Lower setpoint SL ×c1
04 Preset actual value SV ×c1
05 Actual value in Run mode QV ×
1) The value can only be written if it is assigned to a constant in the program.
JThe data for index 2 to 5 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 ––––– EN1SE2RE3
FB output Data 3 ––––ZE4CY5FB6OF7
1) Counter enable
2) Transfer preset actual value on rising edge
3) Reset actual value to zero
4) Zero: Status 1 if the value of the function block output QV (the
counter status) equals zero
5) Carry: Status 1 if the value range is exceeded
6) Fall below: Status 1 if the actual value lower setpoint
7) Overflow: Status 1 if the actual value lower setpoint