Omron CJ1W-FLN22, Operation Manual, Page: 143 / 277

117
Command/Response Reference Section 7-5
7-5-6 TRANSPARENT MESSAGE RECEIVE FRAME READ
Reads a transparent message (transaction code: 00000 to 59999) that was
received. Execute this command when bit 1 (Readable Message Received
Flag) of the Unit Status CPU Bus Unit Area in the CIO Area (CIO 1500 + unit
number × 25 + 6 words) is ON. An error response (response code 0x0001)
will be returned if this command is executed when bit 1 is OFF.
Command Block
Response Block
Parameters
FA Message Header
(Response) FA message header of response to the transparent message frame that was
transmitted.
FA Message Data
(Response) FA message data of the response to the transparent message frame that was
transmitted. Refer to the following pages for details.
Response Codes
Setting Data for FA Message Headers of Transparent Messages
When reading received message frames from a user program, check the non-
shaded items from the following FA message header data.
TFL: Total number of bytes of FA message header and FA message data
SNA: Source node number
TCD: Transaction code
29 02
Command
code
29 02 64 bytes
0 to 1,024 bytes
Command
code
Completion
code
FA message header FA message data
Response code Description
0000 Normal completion
0001 Reception buffer overflow, queuing not started (reception side)
1001 Command length too long
Offset Symbol Item
+0
words H_TYPE (Upper) Header type Upper: Header type: 0x4641 fixed
+1 H_TYPE (Lower) Lower: Header type: 0x434E fixed
+2 TFL
(Upper)
Total byte length of header and data Upper: 0x0000 fixed
+3 TFL
(Lower)
Lower: Byte length
+4 SNA (Upper) Source node address (node number)
+5 SNA (Lower)
+6 DNA (Upper) Destination node address (node num-
ber) Upper: 0x0001 fixed
+7 DNA (Lower) Lower: source node number
+8 V_SEQ (Upper) Sequence version number
+9 V_SEQ (Lower)
+10 SEQ (Upper) Sequence number After 0xFFFFFFFF, returns to
0x00000001
+11 SEQ (Lower)