Read/write function block data
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Table 71: Operand overview
Table 72: Index 0: Bit IO
Index
(hex) Operand Value Read Write
00 Bit IO JTable72 ×
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 ––––EN1SE2D3RE4
FB output Data 3 ––––ZE5CY6FB7OF8
1) Counter enable
2) Transfer preset actual value on rising edge
3) Count direction: 0 = up counting, 1 = down counting
4) Reset actual value to zero
5) Zero: Status 1 if the value of the function block output QV (the
counter status) equals zero
6) Carry: Status 1 if the value range is exceeded
7) Fall below: Status 1 if the actual value lower setpoint
8) Overflow: Status 1 if the actual value lower setpoint