Specifications

Chapter 3 Connecting on a LAN
Troubleshooting Connectivity to an Existing JACE Controller
Niagara Release 2.3
Niagara Networking & Connectivity Guide Revised: May 22, 2002
3–21
Step 4 Type the first two characters of the hexadecimal number (this is the first octet).
For example, if the number displayed is FFFFFFC0, you would type FF.
Step 5 Click the Dec (decimal) radio button.
Step 6 Read and record the value displayed.
In the example, FF (hex) converts to 255 (decimal). This is the first octet, or 255.
Step 7 Continue converting (if necessary) and recording each pair of characters, inserting a
period between each octet.
The example converts to 255.255.255.192
Other Access Methods
If you cannot reach the JACE after troubleshooting using the methods described
previously, the next sections describe some other techniques you can use for
accessing JACEs.
JACE-NP As a last resort, if you are running an NP with the full version of Windows NT 4.0,
you can connect a keyboard, mouse, and monitor to the unit, reboot and log in. This
is not an option for a JACE-NP running embedded NT because it does not recognize
these devices.
If you cannot reach a JACE-NP with the Admin Tool, NetMeeting, or by logging in,
consult Systems Engineering.
JACE-4/5 If for some reason a JACE-4/5 is not accessible over the LAN, you can connect to a
JACE-4/5 with Hyperterminal and a null modem connection and change the IP
address and subnet mask. This may make it available again.
Use the following procedure to change these network settings using Hyperterminal.
Caution Be very careful when using the target shell on a JACE-4/5. You must log on
to the JACE with administrative privileges, which means you can change
many settings. Changes you make could have unexpected consequences,
including making the JACE inoperable.
Procedure 3-9 Changing network settings using Hyperterminal.
Step 1 Using Hyperterminal on your engineering station, connect to the VxWorks
command shell as described in Procedure 2-5.
Step 2 At the [VxWorks Boot:] prompt, type:
[VxWorks Boot:] c
This puts the JACE in system change mode.