User's Manual

Table Of Contents
CHAPTER 3
Performing Advanced Functions
36
RETURNS The return result depends on the control byte. However, whatever
the return result is, it includes the control byte.
REMARKS The general behavior is that a PORT command issued on a certain
port bit will override any previous PORT commands. For example, if
a port was configured as input and then an MFR (monostable func-
tion) was issued, the port automatically switches to output. A new
MFR or similar function clears the status of the port and starts from
scratch, even if the previous command was not finished.
REMOTE Yes, for the A720. If you are using a terminal window for the A720,
you cannot issue the PORT command. If you are using a terminal
window for the A720B, you can issue a PORT command remotely
for an A720 RTU, but you cannot issue the command for the
A720B receiver. In other words, the base station can issue a remote
command for an RTU, but it cannot issue such a command for
itself. An RTU cannot issue the command at all, but can execute it.
EXAMPLE For RDP:
6789 PORT 0
6789 PORT 0 1 0
#
For RDDR:
6789 PORT 16
6789 PORT 16 0 0
#
1110 MVFR – Multivibrator function, start with the
specified bit in OFF state (reset).
The port number,
the OFF and the
ON times (in sec-
onds), both as 16-
bit integers.
Result (OK or ERROR).
1111 MVFS – Multivibrator function, start with the
specified bit in ON state (set).
The port number,
the OFF and the
ON times (in sec-
onds), both as 16-
bit integers.
Result (OK or ERROR).
a. See also “Notifications” on page 42.
Table 4. Command Code Definitions (Continued)
Code Description Parameters Returns