2

Status Length: This is the sum of the LIS bits and the Channel Status bits. This value is automatically set to either 80 bits (for %I and %Q Status address locations) or 5 words (for %R, %AI, and %AQ Status address locations).

IP Address, Subnet Mask, Gateway IP Address, and Name Server IP Address: These values should be assigned by the person in charge of your network (the network administrator). TCP/IP network administrators are familiar with these parameters. It is important that these parameters are correct; otherwise, the Ethernet Interface may be unable to communicate on the network and/or network operation may be corrupted. It is especially important that each node on the network is assigned a unique IP address.

However, if you have no network administrator and are using a simple isolated network with no gateways, you can use the following range of values for the assignment of local IP addresses:

10.0.0.1First PLC

10.0.0.2Second PLC

10.0.0.3Third PLC

.

.

.

.

.

.

10.0.0.255

PLC Programmer TCP or host

Also, in this case, set the subnet mask, gateway IP address, and name server IP address to 0.0.0.0.

Note

If the isolated network is ever connected to another network, the IP addresses

10.0.0.1through 10.0.0.255 must not be used and the subnet mask, gateway IP address, and name server IP address must be assigned by the network administrator. The IP addresses must be assigned so that they are compatible with the connected network. Refer to Chapter 6, “Network Administration Support”, for more information on addressing.

See also “Determining If an IP Address Has Already Been Used” in this section.

Network Time Sync: Selection of the method used to synchronize the real-time clocks over the network. Currently the choices are None/DISABLED (for no network time synchronization) and SNTP/ENABLED (for synchronization to remote SNTP servers on the network).

AAUI Transceiver Power (Watts): Allows you to account for the power consumption added by the AAUI Transceiver attached to the Ethernet module (measured in Watts). The valid range is 0.0 to 2.00. The default value is 0.0.

2-24

TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual– May 2002

GFK-1541B

Page 37
Image 37
GE GFK-1541B manual