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10 Programming Guide
This section explains the sensor's communication protocol to be used when writing custom programs
for your applications or when communicating with your sensor with a terminal program over RS485
or LAN/Ethernet interface.
10.1 Remote versus Manual Considerations
Since the sensor includes a local user interface, the possibility exists for a person to make manual
changes to parameter settings. To resolve conflicts between inputs to the sensor, the following rules
are valid:
•
•
•
All parameters set via the Control Panel (user interface), the RS485 (2-wire, half duplex) or the
LAN/Ethernet interface are retained in the sensor's nonvolatile memory.
10.2 Command Structure
Protocols are the set of commands that define all possible communications with the sensor. The
commands are described in the following sections along with their associated ASCII command
characters and related message format information. Types of commands include the following:
1. A request for the current value of a parameter
2. A change in the setting of a parameter
3. Defining the information contents of a string (either continuously output or periodically
The sensor will respond to every command with either an "acknowledge" or a "not acknowledge"
string. Acknowledge strings begin with the exclamation mark (!) and are either a confirmation of a set
command or a request of a parameter value. If the unit is in multidrop mode the 3-digit address has to
be sent out before the exclamation mark.
For a new parameter setting by the user, a range check of allowed values will be performed by the
Endurance firmware. If an out of range for a parameter is detected by the firmware, a Range Error is
indicated and transmitted back by the Endurance sensor.
ENDURANCE 1R
info@Raytek-Direct.ca
Command precedence: the most recent parameter change is valid, whether originating from
manual or remote.
If a manual parameter change is made, the sensor will transmit a "notification" string to the
host. (Notification strings are suppressed in multidrop mode.)
A manual lockout command is available in the protocols set so the host can render the user
interface "display only," if desired.
When a unit is placed in multidrop mode its manual user interface is automatically
locked! It can be unlocked with the command XXXJ=U <CR>, where XXX is the
multidrop address.
polled at the option of the user)
All commands via RS485 or LAN/Ethernet interface have to be entered in upper case
(capital) letters.
Programming Guide
Rev. E1 Sep 2015
49
1.800.868.7495
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