User`s guide

4.3. Initialize Unit to Default Settings
If SetUp Switch settings are changed, new parameters will not
take effect until the APS-8M is initialized.
CAUTION: After initialization, the APS-8M will
revert to the parameters specified by the SetUp
Switches. Any command-selected parameters will
be lost.
1. Simultaneously press the SET and CLEAR buttons, located
on the face of the APS-8M.
2. Release the CLEAR button, wait for the Port LEDs to
flash, and then release the SET button.
4.4. Connecting Devices to the APS
APS RS232 Ports one through seven are standard DB9
connectors, configured as DTE Ports, and are similar to a
standard serial port on a PC.
1. Access the APS-8M Command Mode.
2. Determine which RS232 port will be used for connection to
the new device (e.g. Port 3).
3. Check Buffer: Type /S [Enter] to display the Port Status
Screen. Check the "Buffer Count" column, which lists the
amount of data stored in the buffer for each port.
a) If the Port Status Screen shows data stored in the buffer
for the desired port, type /E xx [Enter] to clear the
buffer (where xx is the desired port number).
b) Note that cleared data cannot be recovered.
4. Use an appropriate DB9 cable to connect the RS232 serial
port on the device to the selected DB9 port on the APS.
a) External Modems and other DCE Devices: Use a
standard serial modem cable.
b) PCs and other DTE Devices: Use a standard null
modem cable.
5. Select communication parameters for the port as described
in Section 5.
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APS-8M User’s Guide