Unit installation

Chapter 4 Configuration Installation and Operation Manual
4-16 Using the Explicit Command Mode FCD-E1
Command Protocol
Command Evaluation and Execution
• If Autobaud is on, start any session by pressing the <Enter> key three times in
sequence. This ensures identification of terminal data rate.
• When the FCD-E1 uses a non-zero node address, it expects an address before
responding to the terminal commands. No response occurs until the node
number is received and acknowledged by the addressed FCD-E1. The address
is in the range of 1 through 255 (0 indicates that the selective addressing
function is disabled). The address is a prefix sent in the following format:
Node<SP>nnn<SP>.
The echoing of the node address part, i.e., Node <SP> nnn <SP> indicates
acknowledgment, where <SP> stands for space.
• When password protection is on, the addressed FCD-E1 waits for the
password before continuing. After the correct password is received, FCD-E1
sends the working prompt, FCD>.
If password protection is off, this step is omitted and the working prompt
appears after the node address conditions are fulfilled.
• After the working prompt is displayed, every character typed on the terminal
keyboard is immediately evaluated by FCD-E1 and echoed to the terminal
screen. Full duplex communication with the terminal is therefore necessary, to
provide on-line feedback to the terminal operator.
• In case an error is detected during command evaluation, the command is not
executed. Instead, FCD-E1 sends the erroneous command back to the
terminal, and you will see BAD COMMAND in the next row. The correct
command must then be sent again.
• The command is executed only after it is validated. After command execution
is completed, you will see the date and time, followed by the working prompt.
• Pressing CTRL+C can interrupt command execution. This will result in the
display of the FCD-E1 prompt, and a new command can be entered. Use the
BREAK key to stop the automatic repetition of commands (/R option).
• If you are not using the multidrop mode, then you can edit previous
commands by pressing CTRL+A. FCD-E1 stores the last 10 commands in a
special buffer, and each CTRL+A pressing retrieves the previous command
from that buffer. The retrieved command appears on the command line, and
can be edited as desired.
• If you are not using the multidrop mode, press CTRL+D to execute again the
last command.