Packed Process Data - Emerson PACSystems RSTi-EP User Manual

User Manual
GFK-2958L
4.4.7

Packed Process Data

Packed input process data
Input register range: 0x0000 to 0x01FF
Note:
Packed output process data
Output register range: 0x0800 to 0x09FF
Note:
Structure of packed process data
The byte granularly packed process data contains all input data (register range 0x0000 to
0x01FF) and output data (register range 0x0800 to 0x09FF) of the RSTi-EP station.
Note: The start address(es) of each module's process data are listed in register 0x2B00
Example of an Optimal Module Arrangement
Input
Product
data
EPXMBE001/
EPXMBE101
EP-4164 --
EP-3164 4 words
EP-1214 1 Byte
EP-1214 1 Byte
EP-125F 2 Byte
EP-153F 2 Byte
Total
Detailed Descriptions of the Fieldbus Network Adapters
Access to all 512 registers is always possible regardless of the I/O structure. Unused
registers respond with "0".
Access to all 512 registers is always possible regardless of the I/O structure. Unused
registers send "0" during a read access, write accesses are ignored.
– 0x2B7F (refer to Section 0x2B00 – 0x2B7F Module Offsets of Process Data).
Process data is mapped according to how the modules are arranged. To avoid
larger gaps in the process data, the different modules should be arranged in an
optimal manner.
Output Number of input
data registers
0
4 words 0
-- 4
-- 1
-- 0
1
1
7
Number of output
Remarks
registers
0
4 allocated 4 registers
0 allocated 4 registers
allocated 1/2 register low
0
byte (1 byte)
allocated 1/2 register high
0
byte (1 byte)
allocated 1 register
allocated 1 register
4
Section 4
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