51
Communications Port 2
Signal
SD
RD
RS
CS
CD
2
3
4
5
7
Pin no.
Using RS-232C
Signal
SDA
SDB
RDA
RDB
1
2
6
8
Pin no.
Using RS-422
4-2-2 Test Contents
The wrap communications test is executed at the communications port desig-
nated on the DIP switch. By wiring the connector as shown in the previous dia-
grams, data is looped back. The data looped back is compared with the original
data to ascertain if they match.
Specifications Baud rate: 1,200, 2,400, 4,800, 9,600, and 19,200 bps
(switched in sequence automatically 5 times)
Stop bits: 2
Parity: Even
Data length: 7 bits
Data Transferred The C-mode command TS is used to transfer 200 characters (209 characters
including the header, all in hexadecimal, 00 to 63).
Completion of Test When the test finishes, the TS1 or TS2 indicator, which has been lit, will start
flashing. If there is an error during the test, the ERC1 indicator, ERC2 indicator,
or ERH indicator will light
Indicators The following table shows the meaning of each indicator.
Indicator Status Meaning
TS1 Lit The test is being executed at port 1.
Flashes The test at port 1 has been completed.
TS2 Lit The test is being executed at port 2.
Flashes The test at port 2 has been completed.
ERC1 Lit Port 1 has a transmission error.
ERC2 Lit Port 2 has a transmission error.
ERH Lit There is a unit number setting or PC error, or no I/O
table has been made.
Test Results The results of the test that has been executed will be recorded in word 15 in the
portion of the CPU Bus Unit Area allocated to the Host Link Unit in the PC. Words
in this area are allocated according to unit number.
15 14 13 12 11 10 9 8 76543210
00000000000000
RS-232C/RS-422 status (0: RS-232C; 1: RS-422)
Test port
Word: 1500 + (25 x Unit no.) + 15
Bit
+15
Wrap Communications Test Section 4-2
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