Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 116)

Remote I/O Communications 8–24
Publication 2706-6.1
Return Message Number and ASCII Data (Block Transfer Read)
The following shows the format of block transfer data returned to the
PLC in Message/Variable/Slave run mode. This data may include
both the message number and message text. If Block Transfer Read
Length is set to 0 in the PLC program, the DL40 Plus returns 12
words.
WORD 1
17 16 15 14
Message Number
WORD 0
Enter Bit
Block Transfer Read File
Any rack size
WORD 2
WORD 3
ASCII Character 1
Acknowledge Bit
Clock/Date Data Bit = 0
Diagnostic Code
ASCII Character 3
ASCII Character 2
ASCII Character 4
WORD 4
WORD 5 ASCII Character 7
ASCII Character 6
ASCII Character 8
ASCII Character 5
WORD 6
WORD 7 ASCII Character 11
ASCII Character 10
ASCII Character 12
ASCII Character 9
WORD 8 ASCII Character 13 ASCII Character 14
WORD 9 ASCII Character 15 ASCII Character 16
WORD 10 ASCII Character 17 ASCII Character 18
WORD 11 ASCII Character 19 ASCII Character 20
Send Clock or Date Data to PLC (Block Transfer Read)
The following shows the format of block transfer clock data returned
to the PLC from the DL40 Plus in Message/Variable/Slave run mode.
If Block Transfer Read Length is set to 0 in the PLC program, the
DL40 Plus returns 2 words.
WORD 1
17 16 15 14 WORD 0
Block Transfer Read File
Any size rack
Clock/Date Data Bit = 1
Diagnostic Code Hour/Month
Minute/Day Second/Year