Transfer Modes; Poll Mode; Burst Mode - RayTek MARATHON FA Operating Instructions Manual

Programming Guide
Example: Send E=0.90 instead of E=0.9; send P=001.2 instead of P=1.2
After transmitting one command, the host has to wait for the response from the unit before sending
another. A response from the sensor is guaranteed within 4 seconds in Poll mode and 8 seconds in
Burst mode at 300 baud. The response is faster at higher baud rates.
An asterisk * will be transmitted back to the host in the event of an "illegal" instruction. An illegal
instruction is considered to be one of the following:
•
Any non‐used or non‐allowed character (unknown command)
•
An "out‐of‐range" parameter value
•
A value entered in the incorrect format (syntax error)
•
Lower case character(s) entered (all characters must be upper case)
9.3 Transfer Modes
The protocol allows the use of two different modes: the Poll Mode and the Burst Mode
9.3.1 Poll Mode
The current value of any individual parameter can be requested by the host. The unit responds once
with the value at the selected baud rate. Additionally, the user‐defined output string can be polled.
9.3.2 Burst Mode
The unit transmits the user‐defined output string (continuously, at the selected baud rate), which may
contain all of the parameters. Parameters may also be polled for while the instrument is in burst mode.
The poll string will be inserted in the burst‐mode stream.
The sensor transmits the parameters in a fixed order, regardless of the order in which they are
specified. This order is as follows:
1. Temperature unit
2. Target temperature
3. Power
4. Emissivity
5. Peak hold time
6. Average time
7. Mode (Setup/Fast)
8. Internal temperature
9. Temperature setting for 20 mA
10. Temperature setting for 0 mA / 4 mA
11. Output current (specified values, in mA, or controlled by sensor)
12. Multidrop address
13. Trigger status
14. Multidrop address
15. Initialization flag
The following items cannot be placed in the burst output string:
•
Poll/Burst Mode
•
Baud rate
•
Manual Lockout/Unlock
40 Marathon Series FA/FR