Rockwell Automation 900 Temperature Controller Communications Functions - Series B - Manual (Page 40)

Publication 900-UM004D-EN-E - July 2010
2-24 Bulletin 900 Communications Procedures 900-TCx (CompoWay/F)
mode while already in manual mode, the command will be completed
normally and the display will not change (the contents will not be
refreshed).
• Writing Auto/Manual Status in EEPROM
The write mode determines whether the auto/manual status is written
to EEPROM.
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 EEPROM. 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
EEPROM. 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.
• 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
Table 2.31
Write Mode Description
Backup mode
When the auto/manual mode is switched by communications,
the auto/manual status is written to EEPROM.
RAM write mode
When the auto/manual mode is switched by communications,
the auto/manual status is not written to EEPROM.
The status can be written with the Controller key operation.
Table 2.32
Related Information Explanation (Initialization Values)
00
Default initialization values (Refer to Communications Data on
page 2-3 for details.)
(These settings are the same as the ones used when “FACT” is
selected for the setting data’s set value initialization.)