User`s guide

General
14 Mitsubishi Electric, MA00759F
2.4 Efficient Communication
To make the communication between the operator panel and the controller quick
and efficient the following should be noted about how the signals are read and how
the reading can be optimized.
Signals Affecting Communication Time
Only signals to objects in the current block are read continuously. This also includes
signals for object dynamics. Signals to objects in other blocks are not read, thus the
number of blocks does not affect the communication time.
Besides the signals to objects in the current block, the operator panel reads the fol-
lowing signals from the controller continuously:
Display signals (Block Properties)
Print signals (Block Properties)
LED registers
Alarm signals
Remote acknowledge signals on alarms and alarm groups
Login signal (Passwords)
Logout signal (Passwords)
Registers for trend curves
Bar graph registers if using min/max indicators
New display register
Buzzer register
Backlight signal
Cursor control block
Recipe control block
Library index register
Index Registers
Controller clock register if the controller clock is used in the operator panel
List erase signal (Alarm Properties)
No protocol control register
No protocol on signal
Signals not Affecting the Communication Time
The following signals do not affect the communication time:
– Signals linked to function keys
– Time channels
– Objects in the alarm messages