
MLC 104 IP Plus Series • SIS
™
Programming and Control
71
Error Responses
When the MLC receives a valid SIS command, it executes the command and sends a
response to the host device. If the MLC is unable to execute the command because the
command is invalid or it contains invalid parameters, it returns an error response to the host.
The error response codes and their descriptions are as follows:
E01 – Invalid input channel number (the number is too large)
E12 – Invalid port number
E13 – Invalid value (the number is out of range/too large) or parameter
E14 – Not valid for this configuration
E17 – System timed out
E22 – Busy
E24 – Privilege violation
E25 – Device is not present
E26 – Maximum number of connections has been exceeded
E27 – Invalid event number
E28 – Bad filename or file not found
E30 – Hardware failure (followed by a colon and a descriptor number) (This is an unsolicited
response.)
Error Response References
The following superscripted numbers are used within the command descriptions on the
following pages to identify commands that may respond as shown:
14
= Commands that yield an E14 (not valid for this configuration) response if the current
configuration of the unit does not support that command.
22
= Commands that yield an E22 (busy) response.
24
= Commands that yield an E24 (privilege violation) response if you are not logged in at the
administrator level.
27
= Commands that may yield an E27 (invalid event number) response.
28
= Commands that may yield an E28 (file not found) response.
Commands and Responses
Using the Command/Response Tables
The MLC can be controlled via either a Telnet (port 23) or RS-232 connection using ASCII
commands, or via a web browser (port 80) connection using URL-encoded commands.
The ASCII and URL commands listed in the
starting on page 77 perform the same
functions, but they are encoded differently to accommodate the requirements of each port
(Telnet or browser).
The ASCII to hexadecimal (HEX) conversion table shown below is for use with the
command/response tables.
The command/response tables
list valid ASCII (for Telnet or
RS-232) command codes, the
corresponding URL (uniform
resource locator) encoded
(for web browsers) command
codes, the responses of the MLC
to the host, and a description of
the function of the command or the
results of executing the command.
ASCII to Hex Conversion Table
•
Space
Figure 36.
ASCII to Hex Conversion Table
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