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Appendix 6 Universal Serial Communications App6-23

• Interrupt conditions

An interrupt code is sent to the host for the following actions.

- When the switch status changes from ON to OFF or from OFF to ON

- When the [ENTER] switch on the keypad changes from OFF to ON. (If [ Use the Write

Flag] in [System Setting] is checked, write enable bit must be set in order to send interruption.)

- When the screen changes by using an internal switch

- When OUT_ENQ in a macro command is run.

• Interrupt timing

When an interrupt condition occurs while the host is transmitting a command or before the V series

machine transmits a response, the interrupt code will be transmitted before the response is

transmitted.

To use an interrupt, it is necessary to enable interrupt code detection when a response is received

on the host program.

• Interrupt code

00H When a regular switch is pressed

01H When the [ENTER] switch on the keypad is pressed

02H When a screen internal switching occurs

10H

•

2FH

In the case of macro command (user setting)

Interrupt

code

DATA

Host side

(command)

Command

V series side

Interrupt

occurrence

Interrupt Interrupt data Response

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Cable Electronics DVP14 Specifiche Pagina 292