Transparent Message Receive Frame Read - Omron CS1W-FLN22 Operation Manual

Command/Response Reference
7-5-6

TRANSPARENT MESSAGE RECEIVE FRAME READ

Command Block
Response Block
Parameters
FA Message Header
(Response)
FA Message Data
(Response)
Response Codes
Setting Data for FA Message Headers of Transparent Messages
Offset Symbol
+0 H_TYPE (Upper)
words
+1 H_TYPE (Lower)
+2 TFL
(Upper)
+3 TFL
(Lower)
+4 SNA (Upper)
+5 SNA (Lower)
+6 DNA (Upper)
+7 DNA (Lower)
+8 V_SEQ (Upper)
+9 V_SEQ (Lower)
+10 SEQ (Upper)
+11 SEQ (Lower)
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.
29 02
Command
code
29 02 64 bytes
Command
Completion
FA message header
code
code
FA message header of response to the transparent message frame that was
transmitted.
FA message data of the response to the transparent message frame that was
transmitted. Refer to the following pages for details.
Response code
0000 Normal completion
0001 Reception buffer overflow, queuing not started (reception side)
1001 Command length too long
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
Header type
Total byte length of header and data
Source node address (node number)
Destination node address (node num-
ber)
Sequence version number
Sequence number
0 to 1,024 bytes
FA message data
Description
Item
Upper: Header type: 0x4641 fixed
Lower: Header type: 0x434E fixed
Upper: 0x0000 fixed
Lower: Byte length
Upper: 0x0001 fixed
Lower: source node number
After 0xFFFFFFFF, returns to
0x00000001
Section 7-5
117