3.4. Communicating with the CPM Unit
Perform the following procedure to enter the CPM Command Mode, explore the unit's basic
features, and check for proper operation.
1. If you have not already done so, start your communications program (e.g. ProComm).
2. Issue the "Wake Port" command to access the CPM Command Mode and make certain the
port is ready to receive commands. Type /, then simultaneously press the [Ctrl] key and
the [E] key, and then press [Enter] (/^E [Enter]). The "CPM>" prompt should appear.
a) If the "CPM>" prompt is displayed, you have successfully accessed the Command
Mode. This indicates the PC has contacted the CPM, and the unit is operating
b) If the "CPM>" prompt is not displayed, this may indicate a problem in communicating
with the CPM unit. Check the following:
Cable Connection: Check the cable connection between the CPM unit and the PC.
Make certain the Snap Adapter and RJ11 cable connectors are firmly seated.
Communication Parameters: Make certain the CPM and ProComm are using the
same communication parameters.
3. Type /H and press [Enter]. The CPM Help Screen will appear as shown in Figure 3.1.
The Help Screen lists all available CPM commands, along with a brief description of each
CPM Series - Control Port Managers, User's Guide Getting Started
/^E Wake-Up Port
/X Sleep - Only Accepts Wake-Up Command
/H Help - Displays Command List
/S Status - Displays Status Screen n Port # or Name
/W [n] Who - Displays Port Parameters N Port #
/C <n> [n] Connect - Local [Remote] | "or"
/D <n> |...| * Disconnect * "all"
/E <n> | * Erase Buffer <> Required Entry
/I Initialize / Test Unit  Optional Entry
/F Enter Site ID
/J Read Site ID
/P <n> Set Port Parameters
/U Read Port Parameters
/L-[n] Load Port Parameters
/G-00 Reset All Ports
/D, /E, /I Commands: Add /Y to bypass "SURE? (Y/N)"
Figure 3.1: The CPM Help Screen