21
IEEE parallel communications
5.3 Protocol selection
The IEEE488 device address is selected via switches 1 to 5 using binary code (see table 6). The range is
1-30. Switch 1 is the least significant bit.
The parallel poll bit is selected via switches 6 to 8 using binary-plus-one code (see table 6). The range is
1-8. Switch 6 is the least significant bit.
Select the DOWN position to set each bit.
CAUTION: The PHC10-2 must be powered down before switch settings are changed. Changes
will take effect when power is switched on.
Table 6 - IEEE PROTOCOL SELECTION
Switch Binary code
1
2
3
4
5
1
2
4
8
16
Least significant bit Device address range 1 - 30
6
7
8
1
2
4
Least significant bit Parallel poll range 1 - 8
For example:
Switches 1, 2 and 6 DOWN - Address 3, Parallel poll bit 2
Switches 6, 7 and 8 DOWN - Address 0, Parallel poll bit 8