Appendix 6 Universal Serial Communications App6-23
<Interrupt Processing (See page App6-38 and page App6-39.)>
• 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)
E
N
Q
HL
Interrupt
code
DATA
C
R
L
F
Host side
(command)
Command
V series side
Interrupt
occurrence
Interrupt Interrupt data Response
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