Mitsubishi Electric MELSEC iQ-R Series - Page 1713

20 SERIAL COMMUNICATION INSTRUCTIONS
20.12 Initial Setting
1711
20
■Applicable devices
*1 Index modification is not available.
*2 FX and FY cannot be used.
*3 FD cannot be used.
■Control data
Operand Bit Word Double word Indirect
specification
Constant Others
(U)
X, Y, M, L,
SM, F, B, SB,
FX, FY
J\ T, ST, C, D, W,
SD, SW, FD, R,
ZR, RD
U\G, J\,
U3E\(H)G
Z LT, LST,
LC
LZ K, H E $
(U)
*1
  
(s1) 
*2

*3

(s2) 
*3

(d1) 
*3

(d2) 
*2

*3

Operand: (s2)
Device Item Description Setting range Set by
+0 Execution type Specifies 0. 0 User
+1 Completion status Used to store the completion status.
•0: Normal
• Other than 0: Error (error code)
 System
+2 Request type Specifies the contents of request.
• 1: Changes the unit of data (word or byte) and the buffer memory assignment.
1 User
+3 Word/byte specification Specifies the unit of the amount of send/receive data.
• 0: Current set value
• 1: In units of words
• 2: In units of bytes
0 to 2 User
+4 Buffer memory start
address for on-demand
function
Specifies the start address of the buffer memory area to be used for the on-demand
function.
• 0: The current set value is used.
• 400H to 1AFFH, 2600H to 3FFFH: Start address
0H, 400H to
1AFFH, 2600H
to 3FFFH
User
+5 Size of buffer memory
for on-demand function
Specifies the size (words) of the buffer memory area to be used for the on-demand
function.
• 0: The current set value is used.
• 1H to 1A00H: Size
0H, 1H to 1A00H User
+6 Sending area start
address
Specifies the start address of the sending area to be used for the nonprocedural or
bidirectional protocol.
• 0: The current set value is used.
• 400H to 1AFFH, 2600H to 3FFFH: Start address
0H, 400H to
1AFFH, 2600H
to 3FFFH
User
+7 Size of sending area Specifies the size (words) of the sending area to be used for the nonprocedural or
bidirectional protocol. The one word start area of the sending area is used for
specifying the amount of send data.
• 0: The current set value is used.
• 1H to 1A00H: Size
0H, 1H to 1A00H User
+8 Receiving area start
address
Specifies the start address of the receiving area to be used for the nonprocedural or
bidirectional protocol.
• 0: The current set value is used.
• 400H to 1AFFH, 2600H to 3FFFH: Start address
0H, 400H to
1AFFH, 2600H
to 3FFFH
User
+9 Size of receiving area Specifies the size (words) of the receiving area to be used for the nonprocedural or
bidirectional protocol.
The one word start area of the receiving area is used for specifying the amount of
send data.
• 0H: The current set value is used.
• 1H to 1A00H: Size
0H, 1H to 1A00H User
+10 to
+111
For system Use prohibited (not available also for other applications such as programming)  System