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2 CompoWay/F Communications Procedures
• Auto/Manual Switch
This operation command switches the mode to manual mode or automatic mode, based on the
related information setting. When the Controller is switched to manual mode, the "manual control
level" will be displayed. When the Controller is switched from manual mode to automatic mode,
the operation level's first parameter will be displayed. When the Controller is switched to manual
mode while already in manual mode, the command will be completed normally and the display will
not change (the contents will not be refreshed). The setting can be made in setup area 0.
An operation error will occur in the following situations.
• When the command is executed in "setup area 1"
• When auto/manual is set for an event input
• Writing Auto/Manual Status in Non-volatile memory
The write mode determines whether the auto/manual status is written to non-volatile memory.
Write mode
Backup mode
RAM write mode
Note: When the auto/manual mode is switched with an operation command through communications
and the Controller is in RAM write mode, the auto/manual status is not stored in non-volatile
memory. Consequently, if the Controller is restarted by performing a software reset or turning the
power OFF and ON again, the auto/manual mode is set to the last saved status.
• Switching to Manual Mode during Auto-tuning
If the mode is switched during auto-tuning (AT), the AT will be cancelled and the Controller
will be switched to manual mode.
• Parameter Initialization
The present settings are returned to the default values and written to non-volatile memory. This
command can be accepted in setup area 1 only. When this command is issued in setup area 0, an
"operation error" will be generated. (These settings are the same as the ones used when "FACT"
is selected for the setting data's set value initialization.)
• Alarm Latch Cancel
The applicable alarm latch can be cleared with the related information setting. The setting can be
accepted in both setup area 0 and setup area 1.
• Invert Direct/Reverse Operation
Inverting or not inverting direct/reverse operation can be selected with the related information
setting. The setting can be accepted in both setup area 0 and setup area 1. The related
information specifications are written to non-volatile memory according to the write mode settings.
An operation error will occur in the following situations:
• When AT is being executed.
• When inverting direct/reverse operation is set for an event input.
• When executed in manual mode.
• PID Update (Adaptive Control)
The PID is updated when PID constants that can be updated are calculated for adaptive control.
This command can be accepted in setup area 0 only.
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Description
When the auto/manual mode is switched by communications, the
auto/manual status is written to non-volatile memory.
When the auto/manual mode is switched by communications, the
auto/manual status is not written to non-volatile memory.
The status can be written with the Controller key operation.
E5@D Digital Temperature Controllers Communications Manual (H225)
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