Ch1 Check; Ch2 Check; Ch3 Check; Ch4 Check - Sharp ER-A750 Service Manual

ER-A7RS CON3
S1-4 S1-5 S1-6
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
2 Terminating procedure
Press the CANCEL key to terminate the check.

2) CH1 Check

1 Check content
When the channel is not set, an error display is made
(ERROR:CH1). When the channel is set, the following check is
performed.
•
Control signal check
ERn RSn
OFF OFF
OFF ON
ON OFF
ON ON
The read check of the above inputs and the interruption check
of CS, CI, and CD are performed.
In the read check, ER and RS are changed over in the above
sequence and the logic states of DR, CI, CD, and CS are
checked.
If the logic differs from that in the table, an error display is
made.
"ON" in the table means Active LOW, and "OFF" means Active
HIGH.
In the interruption check, an interruption of CS, CI, or CD is
allowed one by one. (MASK is canceled.)
If an interruption is not made when each signal is active, or if
an interruption is made when each signal is not active, an error
display is made.
The above check is repeated four cycles.
•
Data transfer check
The loop back data (256 bytes) of 00H
data transfer check. The baud rate is set to 38400BPS.
•
Timer check (RS232 on board timer)
Before performing the check, set the timer to TCVDT start and
5ms. Then perform the following procedure.
* During execution of the
generated.
* After 5ms from completion of the check, TRQ- must be
generated.
CHANNEL
Invalid
CHANNEL 1: Impossible to set
CHANNEL 2: Impossible to set
CHANNEL 3
CHANNEL 4
CHANNEL 5
CHANNEL 6
CHANNEL 7
DRn CIn CDn
OFF OFF OFF
OFF OFF ON
ON ON OFF
ON ON ON
0FFH are used for
check, TRQ- must not be
2 Display
RS232 CH1 Check
ER-DR
All the contents of an error must be displayed.
ERROR
ERROR display
No.
1 ER-DR:ERROR
2 ER-CI:ERROR
3 RS-CD:ERROR
4 RS-CS:ERROR
5 CI INT:ERROR
6 CD INT:ERROR
7 CS INT:ERROR
8 TXEMP:ERROR
9 TXEMP INT:ERROR
10 TXRDY:ERROR
11 TXRDY INT:ERROR
CSn
12 RCVRDY:ERROR
OFF
ON
13 RCVRDY INT:ERROR RCVRDY interruption is not made.
OFF
ON 14 SD-RD:ERROR
15 SD-RD:ERROR
16 TIMER:ERROR
17 TIMER INT:ERROR
3 Terminating procedure
Press the CANCEL key to terminate the check.

3) CH2 Check

1 Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.

4) CH3 Check

1 Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.

5) CH4 Check

1 Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.

6) CH5 Check

1 Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.

7) CH6 Check

1 Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.

8) CH7 Check

1 Check content
The check procedure, the display, and the terminating procedure
are the same as CH1 Check.
6 – 6
: ERROR!!
ERROR content
ER-DR LOOP ERROR
ER-CI LOOP ERROR
RS-CD LOOP ERROR
RS-CS LOOP ERROR
CI interruption is not made.
CD interruption is not made.
CS interruption is not made.
TXEMP is not set.
TXEMP interruption is not made.
TXRDY interruption is not made.
TXRDY interruption is not made.
RCVRDY is not set.
(Reception enabled. TR-Q is
generated during check)
SD-RD LOOP ERROR
(DATA ERROR)
SD-RD LOOP ERROR (DATA
ERROR, FRAMING ERROR, etc.)
TIMER ERROR (TMRQ is not set
after completion of check.)
TRQ-1 interruption is not made.