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EPSON PRINTERS
Note:
1. If the host computer is not equipped with the power supply for the
Current Loop interface, these jumpers must be connectecT to perform
communications via the Current Loop interface.
2. Either J7A or J7B must be connected. Since this interface board is factory-
set to use the 8K byte RAM, J7A is connected.
3. Either J9A or J9B jumper is connected at the factory, and this setting
should NOTbe changed by the user. Check the setting on your board and
fill in the table for future reference.
4. Either JX or JF jumper must be connected.
5. Either JCLor JRSjumper must be connected.
Jumper Settings for RS-232C and Current Loop
Refer to Table 6-23 to select from four available protocol selections.
Table 6-23 Jumper Settings for RS-232C and Current Loop
J8A
ON or OFF
ON
ON or OFF
ON
J8B
ON
OFF
ON
OFF
JX
ON
ON
OFF
OFF
JF
OFF
OFF
ON
0
N
JRS
ON
OFF
ON
OFF
ON
OFF
ON
OFF
JCL
OFF
ON
OFF
ON
OFF
ON
OFF
ON
RS-232C level
Current Loop
XON/XOFF control
0
X
X
X
0
X
X
X
Flag Control
0
X
0
X
0
X
0
X
XON/XOFF control
X
0
X
0
X
X
X
X
Flag Control
X
X
X
X
X
0
X
0
O: Protocol possible
X: Protocol impossible
6-23
GENERAL
6.8.3 Setting The Switches And Jumpers On Board #8145
Interface board #8145 contains two DIP switches and 7 jumpers to permit
selection of various conditions. The factory-set and function of each switch
and jumper are shown in Tables 6-24through'6-28.
Table 6-24 Setting of DIP Switch 1
Switch
Function
Factory
Set
1-1
Bit Rate Selection (See Table 6-25)
ON
1-2
Bit Rate Selection (See Table 6-25)
ON
1-3
Bit Rate Selection (See Table 6-25)
ON
1-4
Bit Rate Selection (See Table 6-25)
OFF
1-5
Data entry ready flag control (See Table 6-26)
ON
1-6
Data entry ready flag control(See Table 6-26)
ON
1-7
ON:
Parity check disabled
Off:
Parity check enabled
OFF
1-8
ON:
Even parity check
Off:
Odd parity check
ON
Note;
1. Should a parity error occur, an asterisk (*) mark is printed in lieu of the
error character.
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