KEP MMI-1500 Installation & Operation Manual page 133

Note: Set Style Functions
Set Style
ON
OFF
Toggle
Momentary
Periodical toggle
Description of action
When the Set Bit Part is pressed, the designated Device address is turned ON. The state
continues (i.e. remains ON) even after release.
When the Set Bit Part is pressed, the designated Device address is turned OFF. The state
continues (i.e. remains OFF) even after release.
Every time the Set Bit Part is pressed, the designated PLC bit is complemented (ON
OFF, OFF ON)(Toggles).
Only while the Set Bit Part is held down (pressed), is the specified Device address turned
ON. Likewise, when the switch is released, the specified bit address is turned OFF.
Note: This software has three operation modes to handle momentary switch operations,
based on the current value of LW9044. Use an " Set ON at window open" Set Word part in
the start up window to configure the desired operating mode. Operating Modes are as
follows:
0: Window popup is enabled during touch operations (down and up), when the touch is
released (up) the BIT that was previously set ON is set OFF even if the popup
window hides the momentary switch. (Default Mode of operation)
1: Window popup is disabled during touch operations (down and up). This prevents
popup windows from hiding momentary switches.
2: Window popup is enabled during touch operations (down and up). If the momentary
switch is hidden by a popup window at the time touch release (up), the BIT is not
reset.
Note: DO NOT USE HMI MOMENTARY OPERATIONS FOR CRITICAL FUNCTIONS.
Communications failures between the HMI and the controller during a momentary
operation may cause the HMI to ignore touch release thus causing damage to
machinery and operator.
The following styles do not require touch to be activated.
They are activated by the specified event or condition.
Changes the state of the designated bit at a regular interval as selected in the Interval
dropdown. Interval time in actual operation may vary from specified. Do not use HMI
intervals for critical timing.
Design Tip: Use a Set Bit, Periodical toggle part on the common window to reset a timer
in the controller. The timer can then be used as a watchdog to tell if the HMI
communications link has been broken.
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