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Valcretec OPOS Utility User Guide
5
Basic Operation
The Basic Operation is
all device’s common OPOS implementation. User can
operate it
on the “Basic Panel”. As the below
ClaimDevice(Method): Call this method to request exclusive access to the
device.
Close(Method): Called to release the device and its resources.
Open(Method): Call to open a device for subsequent I/O. The device name
Open(Method): Call to open a device for subsequent I/O. The device name
specifies which of one or more devices supported by this software should
be used. The LDN must indicate exactly the Valcretec OPOS Service
Object 1.12.00.
ReleaseDevice(Method): Call this method to release exclusive access to
the device.
DeviceEnabled(Property): Set
“true” to make the device operational. It can
be set by
“Enable” button and “Disable” button on the “Basic panel”.
“Basic Panel” can be switched between Simple mode and Detail mode with “simple
mode” check box. Simple mode has two big button “Open” and “Close”. Open
mode” check box. Simple mode has two big button “Open” and “Close”. Open
Operation consists with Open, ClaimDevice, and DeviceEnabled=true and Close
Operation consists with DeviceEnabled=false, ReleaseDevice, and Close. In Detail
mode, user can operate each implementation step by step.
If Open is touched when the device is already opened an error "EIllegal(106)" will
display to show the device is already open.
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