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Chapter
8
Troubleshooting
Chapter
1
Instructions for
Safe Use
Chapter
2
Product
Overview
Chapter
3
Connection and
Installation
Chapter
4
Names and
Functions
Chapter
5
Mode of Use
Chapter
6
Parameter
Settings
Chapter
7
External Input and
Output
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Chapter
9
Specifications
7-4-2 Communication Command Procedure
The communication command procedure and precautions are described below.
■
When the initial parameter (communication output mode) is set to communication
command support mode, this unit executes communication control using the following
command procedure.
■
When receiving a command from an external device, such as a PC, the unit sends a
response. When a command that requires no reply data is received, the unit sends a
receipt acknowledgment.
If the unit sends no receipt acknowledgment, it indicates that a communication error has
occurred.
■
All transmitted and received data have a fixed length.
Note that no data items or digits can be omitted.
For example, zero (0) must be indicated as “+00.0000”, showing zero at each required
digit, and with a sign.
■
“
” indicates a space (20H) in the formats shown below.
■
“
C
R
” (0DH) and “
L
F
” (0AH) at the ends of lines may, depending on the delimiter
specified by the communication setting parameter, be abbreviated to
C
R
and
L
F
respectively.
■
Unless otherwise noted, alphanumeric characters are ASCII characters.
(When “1” is displayed, it is expressed as 31H in hexadecimal notation.)
1) Command receipt acknowledgment (Rs)
Functions
Sends a response to a command that requires no reply data or to a
command that could not be received properly.
Reply format
(Display unit
→
PC)
1
6
R s
<Receipt acknowledgment code>
C
R
L
F
Data details
Receipt acknowledgment code (1 character)
0 = Command receipt completed
1 = Command format error
Setting the parameter P06
To execute the communication command procedure described here, set initial parameter P06
to “Communication command” (Sd-1).
Chapter
7
External Input and
Output