Cable Electronics DVP14 Specifications download pdf (Page 298)

Appendix 6 Universal Serial Communications App6-29

Response Time and BUSY

Response time varies depending on the type of command.

• RM / RI / RC

These commands immediately send a response once receipt of data is complete.

No NAK [01] (BUSY) signal is given.

• WM / TR / WI / WC

Once receipt of data is complete, these commands first check the display status. If the display

status is found to be complete, a response is sent and a command is executed.

If the status is BUSY and the display is completed within the time set in [Busy Time], a response is

sent.

If the display is not completed within the specified time, an NAK [01] (BUSY) signal is sent. In this

case, it is necessary to retransmit the command.

When [Busy Time] is set as [0], the machine waits until the display is complete, and then a

response is transmitted after a command is executed.

Command

• Command

Available commands are shown below.

Host side

(command)

V series

(Response)

T = 10 msec or less

Host side

(command)

V series

(Response)

T = [Busy Time] + 10 msec or less

Signal Name Name Contents

RM Read Read data memory

WM Write Write data memory

TR Retry Retry when NAK [01] is BUSY

WI Interrupt Setting Allow interrupt (Connection mode 1 : 1)

RI Read Interrupt Status Read interrupt setting status (Connection mode 1 : 1)

RC Read CHR Read data memory as characters

WC Write CHR Write data memory as characters

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Cable Electronics DVP14 Specifications Page 298