Mitsubishi Electric MELSEC iQ-R Series User Manual page 411

To transmit data without removing NULL characters included in arbitrary user frame portion or the send area on the buffer
memory when 0001H (Auto delete enabled) is set for NULL character automatic removal designation for transmitting data for
data transmission with a user frame, designate the user frame number as shown below.
• Specify the number obtained by adding 4000H to the registered user frame No.
b15 b14 b13
Frame No.
0: Conversion enable 1: Conversion disable
0: Frame registered in Flash ROM 1: Frame registered in buffer memory
When sending data in the portions designated in 4001H to 44AFH, C000H to C01FH, the data is transmitted without
conversion even when the following designations are enabled.
• Specifying an additional code by the transparent code for sending specification (Page 326 TRANSPARENT CODES
AND ADDITIONAL CODES)
• Designating "Enable" in the ASCII-BIN conversion designation area (Page 347 COMMUNICATING WITH ASCII CODE
(ASCII-BIN CONVERSION))
User frame number to be transmitted
1H to 3E7H ( 1 to 999)
3E8H to 4AFH ( 1000 to 1199)
8000H to 801FH (-32768 to -32737)
to b0
User frame designation number to transmit data without removing NULL characters
(4000H added)
4001H to 43E7H ( 16385 to 17383)
43E8H to 44AFH ( 17384 to 17583)
C000H to C01FH (-16384 to -16353)
25 AUTOMATIC REMOVAL OF NULL CHARACTERS INCLUDED IN SEND DATA
25.3 NULL Character Removal to Send Data using Nonprocedural Protocol
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