Allocated Bits, And Display, Of Touch Switches - Omron NT30 Operation Manual

Lamps and Touch Switches

5-3-3 Allocated Bits, and Display, of Touch Switches

Method for PC Notification and NT30/30C Control
Reference
218
Two types of bit can be allocated to touch switches: notify bits - which serve to
notify statuses to the PC - and control bits (lamp bits), which control the lighting
(flashing) of the touch switches. (For other types of function, only lamp bits can
be allocated.) When a touch switch is pressed the notify bit status changes and,
when the control bit is ON, the touch switch lights (or flashes).
NT30/30C
Press
START
abcde
Lights
In order to notify the status of a touch switch to the PC, the touch switch must be
allocated to a specified PC bit so that it can be managed. Designate the area and
bit address.
To use a touch switch for notification to the PC, set the function setting in the
touch switch properties to Notify Bit.
S Types of Notification Operation
It is possible to select one of four types of notification operation that occur when
the touch switch is pressed.
- Momentary
When the touch switch is pressed the bit comes ON and when it is released
the bit goes OFF.
- Alternate
When the touch switch is pressed the bit comes ON if it is OFF and goes OFF
if it is ON.
- Set
When the touch switch is pressed the bit comes ON, and it remains ON when
the touch switch is released.
- Reset
When the touch switch is pressed the bit goes OFF, and it remains OFF when
the touch switch is released.
On one screen, if there is more than one momentary key allocated to the same
bit and these keys are simultaneously pressed and then released, the timing
with which OFF is notified to the PC differs between Host Link and NT Link in the
following way:
Host Link: OFF is notified when all the keys that were simultaneously pressed
have been released.
NT Link: OFF is notified when just one of the keys that were simultaneously
pressed is released.
PC
bit
Notification
1
←1
1
Control
Section 5-3