The c82302*/c82304* interface board has two sets of
DIP (Dual in-line Package) switches, and 16 jumpers.
These switches and jumpers are used for selecting
various interface operations.
Board layout
The figure below shows the layout of the (C82302*/
C82304* board, and the locations of the DIP switches
and jumpers.
Figure 1. Board layout
I
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-point pen
All changes of DIP switch and jumper settings show are
made with the printer power turned off. the printer
chacks and recognizes new settings only at the time the
power is turned on
About DIP switches
The two sets of DIP switches on the C82302*/C82304*
are labelled SW1and SW2.
Each set contains a number
of individual toggIe type switches that can be set either
onoroff. The individual switches are referred to by set
(SW1 or SW2) and number.
Therefore, the switch in set
SW1 marked by the small number 3 is calIed DIP switch
1-3
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DIP switch 1(Interface operations)
The table below contains information on switch func-
tions, and the factory setting
of each
switch.
The
switches on DIP switch 1 allow you to change interface
functions.
- - - - - - -
1- DIP
ON OFF
OFF
Parity check
E n a b l e
O F F
Even Odd
l b OFF
- -
OFF
See Table 3.
1-7
OFF
OFF
Note
1. Positive:
Data Entry Enabled DTR ON (+3V to +27v)
Data Entry Disabled DTR OFF (-3V to -27V)
2 Negative:
Data Entry Enabled DTR OFF (-3V to -27W
Data Entry Disabled DTR ON (+3V to +27v)
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Data word structure
The data word structure is also operator selectable
through DIP switch settings (see Table 1). The word
structure for serial data is:
1 start bit + 7 or 8 data bits (selectable) + 1 Even or
Odd parity bit (optional) + 1 or more stop bits
The table below shows the possible word
structure
Combinations.
Baud rate selection
In serial data communication, data is transmitted in the
form of bits. These data bits go out one at a time along a
single path, and in a specified order. The BPS
(Bits
Per
Second) rate, or speed at which these bits are transmit-
ted, can be selected using a combination of DIP switch
settings.
Note
In the current loop mode, normal data transfer operation
cannot be guaranteed at a baud rate setting exceeding
1,200 bps
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