Eaton Electrical PROFIBUS-DP EZ204-DP - Manual (Page 131)

Read/write function block data
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Table 58: Operand overview
Table 59: Index 0 – Bit IO
Table 60: Index 1 - Mode
Index
(hex) Operand Read Write
00 Bit IO, J Table 59
×
01 Mode, J Table 60 ×
02 Source range 1 I1 × c 1
03 Target range 2 I2
×
c 1
04 Number of elements to
compare: 8 (max. 192 bytes)
NO
×
c 1
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 – – – – EQ 2 E3 3 E2 4 E1 5
1) Activates the function block on status 1.
2) Status 1 if the data ranges are equal; status 0 if not equal
Error outputs
3) Status 1 if the number of elements exceeds the source or target
range.
4) Status 1 if the source and target range overlap.
5) Status 1 if the source or target range are outside of the available
marker range (offset error)
Mode Data 1 (hex) Operating mode
02 Compare (internal EZ status signal
for Block Compare mode)