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CHPA SERIES
The Local, Remote, and Computer modes are the main user interface modes.
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All control points will always provide status.
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Front panel push-button labeled LCL/RMT will toggle between all control points. The front
panel is the "super-user" and may transfer the control point at any time.
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If the control point is transferred from the front panel (LOCAL) to the remote panel
(REMOTE) or the CIF, the remote panel may transfer control between itself and CIF.
•
No control transfer may be commanded via the CIF port.
3.3 Serial Remote Interface
The CHPA Serial Remote Interface is typically used to support serial communications with a
remote control unit, such as the CPI CHPA Remote unit. This port does support multi-drop RS-
422/485 (4-wire) serial communications; even at high baud rates (such as 9600 baud) this port
will support communications over a 4000-ft (1200-m) serial cable.
The Serial Remote Interface can be configured for use with the CHPA Remote unit or for use
with a remote computer similar to the CIF port. To configure the port type, press the MENU
button until the selection RMT CONFIGURATION is displayed. PORT TYPE should be
displayed on Line 4 (press the FUNCTION key if it isn't); use the arrow keys to select either
USER or RMTPNL. RMTPNL will configure the port for the CHPA Remote panel. No other
entries will be available. USER will make the port act similarly to the CIF port. All of the same
protocol and command set choices will be available (press the FUNCTION button to access
these selections). The port will still be subject to the control mode hierarchy described at the
beginning of this section.
The CHPA Serial Remote Interface (J6) is a dual-function port. The user can select one of two
modes: remote panel control mode (RMTPNL) or remote computer control mode (USER). The
CHPA Front Panel controls and indicators are used to configure this port.
RMTPNL automatically configures the port for "plug and play" operation with a CPI CHPA
Remote Control Panel. In this mode, the remote panel is connected to the port with a "straight"
cable (pin to pin connection) and after connection is immediately available for normal REMOTE
operation. When RMT is selected on the Front Panel of the CHPA (LCL/RMT pushbutton), all
remote control are enabled. Refer to Appendix D for a description of the Remote Control Panel
controls and indicators, and Chapter 5, CHPA Control Modes and Heirachy for more detail on
the remote control operation.
Note: The physical size of the Remote Control Panel is not the same as the
Front Panel of the CHPA.
In the remote computer control mode (USER), this port provides a second computer control
interface that has all of the functions and capability of the "CIF" port (J7). This port supports
multi-drop RS-422/485 (4-wire) serial communciations at high band rates (e.g., 9600 baud) over
a 4000 ft, (1200 m) serial cable.
3-2
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