Commissioning the System
113 of 132
Publication S177E V2.0 Issue 12/04
The master station should now be in communication with ALL the field units at the lower speed.
Repeat the whole procedure if not. In some cases individual field units may need to be reprogrammed
with a Paktester or IQ Setting Tool.
13.4.4 Checking Host Communications
If there are no communications between host and master station, check the diagnostic screen's 'Rx'
and 'Tx' flags. Check the port setups at each end (baud rate, parity, etc.), and the cable connections
between the two. These checks will usually succeed in getting messages going to and fro.
To assist in verifying that host communications are functioning correctly a simple screen is available
that shows Modbus messages that have been received, and the validity of the messages. The 'Port
Diagnostic Display' is available for Port 1, 2, and 3 (see section 8.7.2). The last Modbus message
received is displayed together with the number of messages and an error count. Pressing the 'Load'
button will update the screen to the latest information. Successive screen interrogations will reveal all
the Modbus messages being sent to the master station. Pressing the ‘Clear’ button will reset the
message counter to zero.
13.5 Final Checks
When the system is operating correctly use the following list to verify that everything has been
covered.
Action Done
a)
Communication with every field unit and its operation has been verified
…………….
b)
All jumper links on the master station and converter are correct
…………….
c)
The loop parameters for highest address, baud rate and doubling are set
…………….
d)
The Address set the same on the PS100 and the Ethernet link
…………….
e)
Port 1 and 2 communications have been set, ESD actions have been set
…………….
f)
The Security PIN and Access level has been set, tag names are entered
…………….
g)
The Ethernet user passwords and bridge Mode have been set
…………….
h)
The Ethernet LAN parameters have been set (IP address, Gateway etc.)
…………….
i)
The Ethernet email and alarms have been set
…………….
j)
The Comms Fail count for each field unit has been set to zero
…………….
k)
The Port 1 and 2 Message count has been set to zero
…………….
l)
The Clock has been set to the correct time and date
…………….
m)
All the cards are screwed in place
…………….
n)
The documentation record is complete
…………….
