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CTI 2572 Installation and Operation Guide
15
Switchblock 2
Switchblock 2 is used to set the communications parameters for serial port 2. In addition, switches
3,4, and 4 are used to set other module options.
NOTE:
The switches on some modules may be labeled OPEN and CLOSED. The Closed position is equivalent
to ON.
Switch settings not shown are reserved and should set to OFF.
Serial Port Protocol
Switches 6, 7, and 8 on each switch block are used to set the protocol used by the port.
Protocol Description Use
CAMP/NITP Supports both CAMP (Common ASCII
Message Protocol) and NITP (Non-
Intelligent Terminal Protocol).
CAMP is used to transfer large blocks
of data and to perform module specific
functions. NITP is used by many PLC
programming packages.
NITP Only Rejects message formats that are not
strictly NITP compliant.
Applications which require strict
adherence to the NITP specifications
Loopback Loopback generates a series of ASCII
characters that may be directed back to
the serial port via a loopback connector.
Testing serial ports and cables.
PLC Select Allows the PLC logic to select the port
protocol.
Used for custom port protocols
NOTE:
For typical operation, you should set the switches to use the CAMP/NITP protocol.
Figure 10. Switchblock 2