Read/write function block data – Eaton Electrical PROFIBUS-DP EZ204-DP User Manual
Page 137
Read/write function block data
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MN05013001E
133
Table 67: Operand overview
Table 68: Index 0: Bit IO
Index
(hex)
Operand
Value
Read
Write
00
Bit IO
J
Table 68
×
01
Mode/Parameter
–
–
–
02
Upper setpoint
SH
In integer range from
–
2147483648 to
+2147483647
×
c
1
03
Lower setpoint
SL
×
c
1
04
Preset actual value
SV
×
c
1
05
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 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
– – – – SE
1
D
2
C
3
RE
4
FB output Data 3
– – – – ZE
5
CY
6
FB
7
OF
8
1) Transfer preset actual value on rising edge
2) Count direction: 0 = up counting, 1 = down counting
3) Count coil, counts on every rising edge
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 upper setpoint