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6-3-2
Response Flag
The Response Flag changes as shown below for the values of the Request Flag.
Request Flag
0: Disable Writing
1: Enable Writing
2: Initialize Download Areas
*
If a communications error prevents reading data for the Request Flag, the Response Flag will change to
EEEE.
Response Flag at error
EEEE
*1
E001 to E013
8000 (hex) or Operation
Command Code *2
*1
The Response Flag gives the number of the download setting where the error occurred. If more than one
error occurs, the largest number is given first. When the error is cleared, the next error number is given.
Writing the remaining data is continued even if an error occurs during communications.
Example: If errors occur for download settings 10 and 12, the Response Flag will be E012.
*2
An OR of 8000 and the operation command code is given. If a setting range error occurs at the same time,
indicating the operation command error will be given priority.
Example: If an error occurs for operation command code 1101, the Response Flag will be 9101.
Precautions for AT (Auto-tuning)
Do not change the set values in the download area from the start of auto-tuning until auto-tuning is
completed or canceled. Programless communications cannot be used to change the set values of
the E5@D after auto-tuning starts. Also, if the Request Flag is set to 1 (Enable Writing) at the com-
pletion of auto-tuning, the set values in the download area are initialized to the set values from the
E5@D. This is to update the PID constants. (It occurs even if PID constants are not set in the down-
load area.) To prevent initialization, change the Request Flag to 0 (Disable Writing) after auto-tuning
starts. If you change the Request Flag to 1 (Enable Writing) after the completion of auto-tuning, the
values in PLC memory will be written to the E5@D. If you change the Request Flag to 2 (Initialize
Download Areas) after the completion of auto-tuning, the download area will be initialized with the
set values from the E5@D.
Precautions in Using Adaptive Control
If you use automatic updating or notification for adaptive control, do not set the SP response PID or
interference PID parameters in download areas. If you change the Request Flag from 0 (stop
writing) to 1 (enable writing) during operation, the SP response PID values and interference PID
values calculated by the E5@D will overwrite the SP response PID values and interference PID
values in PLC memory. If you want to use the SP response PID values and interference PID values
in the PLC for adaptive control operation, always set fixed adaptive control.
E5@D Digital Temperature Controllers Communications Manual (H225)
Normal
0 *
1
1
There was no response or a communications error occurred when reading the download
area.
• The write data is out of the setting range.
• The Communications Writing parameter is set to OFF.
• The operation command code is incorrect.
• The current status of the E5@D prevents it from acknowledging the operation command.
• The Communications Writing parameter is set to OFF.
6 Programless Communications
Response Flag
Error
EEEE
E001 to E013
8000 or Operation Command Code
EEEE
Cause of error
6
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