Table 2-1 Summary of the function of the buttons (continued)
The buttons
Functions
Function in Alarm Mode
[C]
✓
Enter change mode and erase the value
in the display.
✓
Erase the sign at the cursor.
✓
When the current value is completely
empty, the maneuver mode is cancelled
and the cursor will move to the next
value that will also be erased in the
window.
✓
Undo (erase) the input
✓
Closes the menu containing available
alarm manoeuvres without changing the
state of the alarm point.
[ALARM]
✓
Enter alarm display mode.
✓
Browse among alarms in alarm display
mode.
All EXOcompact controllers have a quick connection for an external display. The maximum permitted cable
length for an external display is 100 m.
2.4 Installation recommendations
Follow these guidelines regarding shielded cables:
✓
Only use shielded cables when the installation environment requires it.
✓
No need for shielded cables between modules, if installed in close proximity
✓
Connect shield to chassis ground at only one end of the cable.
For RS485 communication, the terminal
N
is only required between systems not sharing the same ground
potential. When used, do not connect it to the cable screen. Note that it may be a single wire, but must be
drawn together.
When the cable length is less than 30 m in RS485, a terminator is not required in normal cases. The use of
terminators will decrease signal integrity thus try without first. When used, match the terminator value to
the characteristic impedance of the cable.
Wiring examples can be found under each specific EXOcompact Ardo, Eedo and Vido model in the
following chapters.
EXOcompact Ardo, Eedo and Vido manual, Rev.
B
9
