Black Box PCW22A-R4, PCW22A-R3 manual Switch #4 on =, Self-Diagnostics

CHAPTER 3: Installation

Switch #4 ON =	Self-Diagnostics Mode.
OFF =	Normal Operation.
Switch #5, #6—Block Size Specification.
5	6
OFF	OFF	80 Characters
OFF	ON	128 Characters
ON	OFF	256 Characters
ON	ON	512 Characters

NOTE

For 3741, set SW3, Switch #5: OFF (Fixed length)SW2, Switch #5: OFF, and Switch #6: OFF (128 character block)

Switch #7, #8—Asynchronous Parity Specification.

7	8
OFF	OFF	Space Parity (always 0)
OFF	ON	Mark Parity (always l)
ON	OFF	Odd Parity
ON	ON	Even Parity

NOTE

The A/S-2G only recognizes a 7-bit, 1 bit parity sequence. 8-bit data, no parity is the same as 7-bit, space parity. If you have 8-bit data, no parity, set SW2, Switches #7 and #8 to the OFF position.

3.2.3 SELF-DIAGNOSTICS

There are two ways to enter the self-diagnostic mode. The first method requires that you locate SW2, switch #4 and set it to the ON position. When you press the reset switch, the A/S-2G will display diagnostic information (see below) on a terminal or printer connected to Port A.

The second method requires a terminal connected to Port A. When you type an ampersand (“&”) and then a pound sign (“#”), the A/S-2G will enter the Self-Diagnostics/Reconfigure Switch Menu. Press the “l” key to enter the self-diagnostics mode and the A/S-2G will display diagnostic information on your terminal.

This is what the A/S-2G does in self-diagnostic mode:

Displays its software version

Checks the ROM

Checks the RAM

Displays the state of SW3

Displays the state of SW2

Displays the state of SW1 Port A

Displays the state of SW1 Port B

The information for SW3, SW2, and SW1 is listed in binary: 1=ON and 0=OFF.

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