GE GFK-1541B manual Advanced User Parameters

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Advanced User Parameters

Advanced User Parameters may be set for the Ethernet Interface by creating an AUP file and putting it into the folder for the PLC application.

The AUP file is a text file, created by any convenient text editor. The file name must be

"AUP_0_1.APF". The first line of the file must consist only of the text: "AUP_0_1". Subsequent lines in the file many contain assignments for Advanced User Parameter values using the syntax: <parameter name>=value

There should be no space between the parameter name and the equal or between the equal and the value. Parameter names are the same as described in GFK-1186, TCP/IP Ethernet Communications for the Series 90 PLC, Station Manager Manual, in the description of the PARM command.

Parameter values are converted to lowercase unless enclosed in a pair of double quotes; the parameter value data depends on the parameter. Numeric parameters are entered in decimal or hexadecimal format; hexadecimal values must be terminated with an 'h' or 'H' character. IP address parameters must be entered in standard dotted decimal format. Character string values are case-sensitive; as with Station Manager commands uppercase parameter values must be enclosed within a pair of double quotes.

The semicolon character delimits comments; all characters in the line following a semicolon are ignored. An entire line may be ignored by inserting a semicolon as the first character in the line. A blank line is also ignored.

Caution

The IEEE 802.3 standard strongly discourages the manal configuration of duplex mode for a port (as would be possible using Advanced User Parameters.) Before manually configuring duplex mode for a port using AUP, be sure that you know the characteristics of the link partner and are aware of the consequences of your selection. In the words of the IEEE standard: "Connecting incompatible DTE/MAU combinations such as full duplex mode DTE to a half duplex MAU, or a full-duplex station (DTE or MAU) to a repeater or other half duplex network, can lead to severe network performance degradation, increased collisions, ate collisions, CRC errors, and undetected data corruption."

Note

If speed and duplex mode of a port is forced using AUP, the switch will no longer perform automatic cable detection. This means that if you have the switch port connected to a switch or hub port you must use a crossover cable. If you have the switch port connected to the uplink port on a switch or hub or if you have the switch port connected to another Ethernet device you must use a normal cable.

An example AUP file for the CPU374 to set the IP "Time to Live (TTL)" parameter to the value 5 is shown below. This text would appear in a file named "AUP_0_1.AUP" in the directory of the folder for the PLC:

AUP_0_1

;

; Set IP TTL to 5 ; ittl=5

2-36 TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual– May 2002 GFK-1541B