Control and Status Byte IP/IE5009
Process data mode
Control Byte
The Control byte is only visible in the process image, if the Fieldbus Box is operated in complete mode. It is located in the output image, and can be read or written.
|
Bit |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
|
Name |
RegAccess |
reserved | ||||||
|
Bit |
description |
|---|---|
|
RegAccess |
0bin: Register Communication switched off (Process data mode) |
Status byte
The status byte is only visible if the Fieldbus Box is operated in complex mode. It is located in the input image, and can only be read.
|
Bit |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
|
Name |
RegAccess |
Error |
0 |
0 |
0 |
0 |
FRAME_E |
SSI_IN_E |
|
Name |
Description |
|---|---|
|
RegAccess |
0bin: Acknowledgement for process data mode |
|
Error |
A general fault has occurred. This bit is set if a fault has occurred in FRAME-E or SSI_IN-E |
|
FRAME_E |
The data frame is wrong, i.e. the data frame is not terminated with zero (perhaps wire breakage on clock cables). |
|
SSI_IN_E |
The SSI input of terminal is on low level, if no data transmission occurs. (SSI has no power supply or wire breakage on SSI data inputs D+ or D-, or data cables transposed) |
Register Communication
Control Byte
The Control byte is only visible if the Fieldbus Box is operated in complete mode. It is located in the output image, and can be read or written.
|
Bit |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
|
Name |
RegAccess |
R/W |
Register number | |||||
|
Name |
description |
|---|---|
|
RegAccess |
1bin: Register Communication switched on |
|
R/W |
0bin: Read |
|
Register number |
Number of the register that is to be read or written |
Status Byte
The Status byte is only visible if the Fieldbus Box is operated in complete mode. It is located in the input image, and can only be read.
|
Bit |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
|
Name |
RegAccess |
R/W |
Register number | |||||
|
Name |
description |
|---|---|
|
RegAccess |
1bin: Acknowledgement for register access |
|
R/W |
0bin: Read |
|
Register number |
Number of the register that has been read or written |