The PON bit (bit 7) in the event status register is set whenever the PCR is turned on. The
most common use for the PON bit is to generate an SRQ at power-on to keep track of
unexpected loss of power or power line failure. To do this, follow the steps shown below.
1.
Set *PSC (Power-on Status Clear) to 0 (or OFF).
Enable the backup function of the event status enable register and service request
).
2.
Set the PON bit (bit 7) of the event status enable register.
Permit the transmission of a power-on event to the upper layer (
).
3.
Set the ESB bit (bit 5) of the status byte enable register.
Permit the generation of an SRQ caused by a standard event (
*PSC 0;*ESE 128;*SRE 32
When using the RS232C interface, the PON bit cannot be assigned to the service request,
because SRQs are not generated.
Though the SRQ feature itself is provided by communication protocol on the USB interface
or LAN (VXI-11/ HiSLIP) interface, a Connection Lost error in the VISA I/O session occurs
immediately before the power-on event. It may be difficult to handle PON events when
using the USB interface.
PCR-M series Communication Interface Manual
KIKUSUI ELECTRONICS CORP.
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