Read/write function block data – Eaton Electrical PROFIBUS-DP EZ204-DP User Manual
Page 139
Read/write function block data
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MN05013001E
135
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