CHAPTER 6 USING THE COMMUNICATIONS FUNCTION
E5CK
6--6
6.4 Commands and Responses
This section describes commands and response in detail. The conventions
used in this section and data restrictions are as follows:
•
Data is expressed in 1-byte units and in ASCII code.
•
When the read or write data is a numerical value, the data to be set must
conform to the following conditions:
(1) The decimal point “.” is not indicated in fractions.
(2) The leftmost bit of minus numerical data must be expressed as
follows:
[example]
10.0=[0100], -150.0=[A500], -15=[F015]
J
Reading/writing parameters
F
Reading parameters
Command
Parameter
No.
Parameter
No.
Unit
No.
FCS
CR
Unit
No.
Read data
FCS
CR
End
code
@
@
*
*
2B
2B
4B
2B
2B
2B
2B
4B
2B
2B
2B
1
X
X
X
X
1
Response
X: Any value acceptable
F
Writing parameters
Command
Parameter
No.
Parameter
No.
Unit
No.
Write data
FCS
CR
Unit
No.
Write data
FCS
CR
End
code
@
@
*
*
2B
2B
4B
2B
2B
2B
2B
4B
2B
2B
2B
2
2
Response
Reading or writing of the parameters of a specified controller is executed.
•
Writing is possible only during remote operation.
•
Reading is impossible during executing auto-tuning.
•
The followings are set aside as special commands. For details, see page
6-9.
“run/stop”, “remote/local”, “AT execute/cancel”
•
For details on parameters in each setting level, see the tables on pages
6-7 and 6-8.
With X format “MA” and “ME” commands (see page A---12), you can selec
t
non-vola-
tile RAM or RAM as the memory for the set value. The limit for the number of times
that non-volatile RAM can be written to is 100,000 times. When the number of times
that the set point is written exceeds this limit, set RAM write mode as the memory.
Writing the Set
Value