Omron E5ZD, Руководство по эксплуатации

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End Codes If an end code of 00 was returned in the response, the command was executed
normally. If the end code is not 00, the desired data will not have been read. Re-
fer to
Section 4-1-2 End Codes for a description of the other possible end codes
and their meanings.
4-2-12 Autotuning Commands
Autotuning is used to automatically calculate and set the PID constants. The
control point for which autotuning is to be started must already be in operation
(use Operation Start). Also, if an attempt is made to start autotuning when it is
already in progress, an error will result and an end code of 01 will be returned.
When autotuning is stopped, the values that have been determined are auto-
matically written in as the PID constants, and normal operation is continued.
Depending on the control object, the optimum PID constants may not always be
obtained. In such cases, set the PID constants manually. Also set them manually
if hunting should occur in the control system.
When autotuning is finished, the values of fuzzy scales 1 and 2 will be automati-
cally set according to the measured PID constants for Fuzzy-logic Controllers.
The two commands used for autotuning are Autotuning Start, AS, and
Autotuning Stop, AP.
Command Formats The formats for these commands are as shown below. The unit number and con-
trol point must be specified for Autotuning Start. The unit number must be speci-
fied for Autotuning Stop, but the control point cannot be, i.e., autotuning for all
control points is stopped simultaneously.
Autotuning Start: AS
@ 0 Unit A S 0 Point 0 0 CR
Header code Always 0.
Terminator
*
Data code
FCS
Autotuning Stop: AP
@ 0 Unit A P 0 0 0 0 CR
Header code Always 0.
Terminator
*
FCS
Data code
Command Examples The following command is used to start autotuning for control point 3 of unit 2.
*
@ 0 2 A S 0 3 0 0 5 3 CR
Response Format The response returned for this command is shown below. This response as-
sumes that the header code in the command block was transmitted and read
normally. If the header code in the command block was not recognizable, a
Temperature Control Commands (All Controllers)
Section 4-2