CHAPTER 6 USING THE COMMUNICATIONS FUNCTION
E5CK
6--2
6.1 Outline of the Communications Function
The communications function allows you to monitor and set E5CK
parameters by a program prepared and running on a host computer con-
nected to the E5CK controller. This chapter describes operations as
viewed from the host computer.
When using the communications function, the option unit for RS-232C or
RS-485 communications must be added on. The E5CK communications
function allows you to carry out the following:
•
Reading/writing of parameters;
•
Operation instructions; and
•
Selecting the setting level.
The communications function assumes the following conditions:
•
Writing of parameters is possible in during remote operation. Also,
parameters cannot be written during execution of auto-tuning;
•
Writing parameters are provided with a setting level. Writing conditions
are as follows depending on the setting level:
Setting level 1: No restrictions
Setting level 0: Writing of parameters in the setup and expansion modes
only is prohibited.
•
For details on switching between setting levels, see page 6-9.
•
The “run/stop”, “remote/local” and “AT execute/cancel” parameters are
set aside from other parameters as special commands for instructing
operations.
The host computer sends a “command frame” to the controller, and the
controller returns a “response frame” corresponding to the content of the
command sent by the host computer. In other words, a response frame is
returned for each command frame sent.
The following diagram shows command frame/response frame opera-
tions.
Command frame
Command frame
Response frame
Host computer
E5CK
The host computer carries out communications conforming to the
RS-232C or RS-485 interface specifications.
Option units supporting the RS-232C and RS-485 specifications are as fol-
lows:
•
Option units
E53-CK01 (RS-232C)
E53-CK03 (RS-485)
J
Outline
J
Transfer
procedure
J
Interface
