Emerson FloBoss S600+ User Manual

S600+ Instruction Manual
C-12 Chromatographs Revised July-2017
C.5.1 Telemetry Stages
Data acquisition occurs over a number of stages, during which the data
handling module interacts with the Modbus master module to control
the order of telemetry polling.
The 2251 may enter a phase in which it is busy printing report and
does not respond to poll requests. To avoid spurious poll fail alarms,
the S600+ Modbus software tries to elicit a response every three
seconds for up to 45 seconds before it issues a timeout alarm.
Note: While the 2251 does not directly report the number of the last
stream analysed, this data is assumed to be held as the “current
stream” in register 3034.
Stage
Description
1
Idle
Set the flag for the Modbus master
process to poll for status data at data
addresses 3033-3059.
Set the next stage to Wait for Status
Data.
2
Wait for Status Data
Wait up to the time-out period for the
2251 to respond. If no reply has been
received, then set the telemetry fail
alarm and set the stage to Idle.
If a reply has been received and the new
report available flag is on, then set the
flag for the Modbus master to poll for the
component codes at data addresses
3001 to 3016 and set the next stage to
Poll for Component Codes.
If a reply has been received and the new
report available flag is clear, then set the
stage to Idle.
3
Wait for Component Codes
Poll Reply
Wait up to the time-out period for the
2251 to respond. If no reply has been
received, then set the telemetry fail
alarm and set the stage to Idle.
If a reply has been received, then set the
flag for the Modbus master to poll for the
mole percentage results at data
addresses 7001 to 7016 and set the next
stage to Poll for Mole Percentages.
4
Wait for Mole Percentage
Poll Reply
Wait up to the time-out period for the
2251 to respond. If no reply has been
received, then set the telemetry fail
alarm and set the stage to Idle.
If a reply has been received, then set the
flag for the Modbus master to poll for the
heating value (CV) and relative density
(RD) results at data addresses 7033 to
7039 and set the next stage to Poll for
CV.

Emerson FloBoss S600+ Specifications

General

Brand	Emerson
Model	FloBoss S600+
Category	Controller
Language	English