Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 672

Processing details
• These instructions convert the numerical value of each digit of the BCD 8-digit data in the device specified by (s) to the
ASCII code, and store the converted data in the device number specified by (d) and later.
• The format of the decimal ASCII data to be stored in (d) depends on the status of SM705 (Number of conversion digits
selection).
*1
Status of SM705
OFF
ON
*1 For the firmware version of the CPU module supporting SM705, refer to the following.
 MELSEC iQ-R CPU Module User's Manual (Application)
A CPU module which does not support SM705 operates in the same way as SM705 is off even if it is turned on.
■Operation overview
The following figure shows the operation when SM705 (Number of conversion digits selection) is off and on.
Ex.
When the DBCDDA(P) instruction is executed with BCD 8-digit data "00012345" stored in (s)
(s)+1
b31 ∙∙∙ b16 b15
0 0 0 1 2
DBCDDA(P)
• When SM705 is off, the number of digits is fixed. Each of the leading "0"s of "00012345" is converted into 20H (space) and
stored.
• When SM705 is on, data is left-justified. "00012345" with the leading "0"s omitted ("12345") is converted into ASCII data
and stored, and 00H is stored in the end.
7 APPLICATION INSTRUCTIONS
670
7.8 String Processing Instructions
Storage format of (d)
Data is stored in a fixed number of digits (8 digits)
Each digit is stored left-justified depending on the value of (s).
(s)
∙∙∙ b0
3 4 5
SM705: OFF
SM705: ON
b15 ∙∙∙ b0
(d)+0 20H 20H SP
(d)+1 31H 20H
(d)+2 33H 32H
(d)+3 35H 34H
b15 ∙∙∙ b0
(d)+0 32H 31H
(d)+1 34H 33H
(d)+2 00H 35H
(d)+3
Reference
Page 671 Operation of when SM705 (Number of
conversion digits selection) is off
Page 672 Operation of when SM705 (Number of
conversion digits selection) is on
SP SP 1 2 3 4 5
1 2 3 4 5
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