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Installation
Table 7-7. Asynchronous Multipoint Communications Interface Strapping Options
STRAPPING
STRAP
OPTION
DESCRIPTION
J10
Device 10
Selects device 10 code (0-27) which identifies one terminal from another on a particular communication line.
thru
For example: to set an 10 code of 6, set switches J14 through J10 to 00110 respectively. (See "Device 1.0.
J14
Number" and "Configuration Procedure" in Section V.)
o
=
closed, 1
=
open
J15
(not used)
J16,
Input Buffer Size
J17
J16
BUFFER SIZE
J17
C
C
500 bytes
C
0
1000 bytes
0
C
2000 bytes
0
0
4000 bytes
C
=
closed,
o
=
open
JOO
Group 10
Selects group 10 code (0-27) which identifies the communications line that the terminal is on. For example:
thru
to set an 10 code of 20, set switches J04 thru JOO to 10100 respectively. (See "Device 1.0. Number" and
J04
"Configuration Procedure" in Section V.)
o =
closed, 1
=
open
J05
Extended
Open: Enable Extended Text features. See "Extended Text Mode", Section V.
Text Mode
Closed: Disable Extended Text features.
J06
BCC (Block Check
Determines which type of parity check will be used for an entire block of data in Block Mode.
Character)
Closed
=
0: LRC (longitudinal redundancy check)
Open
=
1: CRC -
16 (cyclic redundancy check)
J07
Code Select
Selects data character and control character code format.
Open
=
1: EBCDIC
Closed
=
0: ASCII
INT
Firmware Interrupt
This switch should always be open.
PLO
Poll Bits
These switches should always be open.
thru
PL6
A4, A9
Module Address
Provides PCA address so that the firmware can address the PCA. These sw:tches should always be set
thru
to 7 (A4 closed, A9 thru A11 open).
A11
-12
13232T Accessory
Closed: Provides -12 volts for operation of relays in the 13232T Power Protect Multipoint Cable.
Power
Open: No power supplied.
2SB
Stop Bit Select
Selects the number of stop bits to be appended to the data bits during transmission.
Open: Selects 2 stop bits.
Closed: Selects 1 stop bit (normal position)
7-24
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