Read/write function block data – Eaton Electrical PROFIBUS-DP EZ204-DP User Manual
Page 143
Read/write function block data
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MN05013001E
139
Table 73: Operand overview
0
Table 74: Index 0 – Bit IO
Index
(hex)
Operand
Value
Read
Write
00
Bit IO
Table 74
×
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
– – – – –
EN
1
SE
2
RE
3
FB output Data 3
– – – – ZE
4
CY
5
FB
6
OF
7
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