Fluke endurance series, User Manual

Page: 87 / 102

Innovative High Temperature Fiber Optic Infrared Pyrometers
Programming Guide
75
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:

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.
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.
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.
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
polled at the option of the user)
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.
All commands via RS485 or LAN/Ethernet interface have to be entered in
upper case (capital) letters.