51
UK
PLC process data input image (Module RWH_RW)
Byte no .
Bit
7
6
5
4
3
2
1
0
1
Diag
DR-RDY
EA
UD=1
RD-RDY
0
AI
TP
2
Read data length
3
Read data byte 1
4
Read data byte 2
,,
. . .
18
Read data byte 16
19
0x00
20
0x00
Description Byte 1, “Status byte”:
Bit
Value
Description
Remark
TP
0
No ID tag detected in front of the Read-/
Write head
-
1
ID tag is detected in front of the Read-/
Write head
Bit is set to 1 as long as the ID tag is detected by the
R/W head . With the channel parameter “data hold time”
the status of the bit can be extended .
AI
0
“Antenna field on” request active
-
1
“Antenna field off” request active
-
RD-RDY
0
No command request detected or
command execution active
Read length / Read data byte is cleared in data byte
2…17 of the PLC process data input image .
1
Command execution is ready .
Diag bit is not set:
Command execution ok .
Read length / Read data byte is set in data byte 2…17
of the PLC process data input image .
Diag bit is set:
Command execution not ok .
Read length / Read data bytes are set to zero .
UD
1
Mode “Read/write used data of the ID
tag” active
Feedback of the selected mode .
EA
0
Mode “Receive User data of the ID tag
on request” active
-
1
Mode “Message controlled reception of
the User data of the ID tag” actives
-
DR-RDY
0
No diagnostic read request or diagnostic
data not ready .
-
1
Diagnostics read request from evaluation
unit ready .
Error code:
Byte 2: Number of diagnostic events
Byte 3-6: Diagnostic message 1
Byte 7 . .10: Diagnostic message 2
Byte 11 . .14: Diagnostic message 3
Byte 15 . .18:
Diagnostic message 4
Diag
0
No error detected
-
1
evaluation unit diagnostics available
Maybe channel related or channel independent error
occurred .
Description Byte 2, ”Read data length”:
Read data length .
Remark: The data length is held according to the setting of the channel parameter “Data Hold Time” .
Description Byte 3... 20, ”Read data byte 1 … 16”:
This data area contains the data of the User data of the ID tag . Unused bytes are set to 0x00 .
In read diagnostics mode this data area contains detailed error codes . The User data are held according
to the setting of the channel parameter “Data Hold Time” .
