Micromod MOD: 30ML and Modcell Maintenance for 2001N, 2002N, and 1800R - Manual (Page 24)

MOD30ML and Modcell Maintenance
VIEWING DIAGNOSTIC DATA
3.3 VIZAPP SOFTWARE
Diagnostic data is viewed via the Instrument Status display in the ViZApp Software. This
display also supports the issuance of a series of instrument commands, and read/write
commands to specific block attributes The following sections provide procedures for
accessing the status page, setting up communications with the required instrument, and then
executing commands as required.
Diagnostic data on all active and unacknowledged diagnostic conditions can be obtained
using a single read command. When the System Event Block is configured to report all
diagnostics, a history of diagnostic events is stored in the system event queue. Reading the
queue displays the events in order of occurrence. The capacity of the queue can be
configured to contain as many as 1000 events. If the capacity is exceeded, the oldest events
are overwritten by incoming events.
Users of the procedures in this section should have general knowledge of the ViZapp
software and the corresponding OPC Server. Comprehensive user information is available in
the ViZapp Help File and in the ViZapp Training Manual. You could be using either of the two
OPC Servers to communicate with the controller:
1. Extended Modbus OPC Server
2. ICN OPC Server
ViZapp Software also provides a way of to debug the control strategy and read diagnostic
information by displaying the live data from the instrument on the algorithm blocks in the
strategy. This is called the Debug mode in ViZapp. See section 3.4 for details.
3.3.1 Extended Modbus (XModbus) OPC Server
The MicroMod Extended Modbus OPC Server is an OPC compliant Server able to
communicate with Extended Modbus devices (MODCELL / MOD 30ML) and serve data to
OPC clients. This OPC server was implemented using advanced programming concepts of
OPC specifications.
The MicroMod Extended Modbus Server is installed along with ViZapp Software. Refer to the
ViZapp installation lab in the ViZapp Training Manual (IB-VIZAPP-TUT) for details.
3.3.2 ICN OPC Server
The MicroMod ICN OPC Server is an OPC compliant Server able to communicate over the
Instrument Communication Network with ICN devices (MODCELL / MOD 30ML) and serve
data to OPC clients. This OPC server was implemented using advanced programming
concepts of OPC specifications.
The MicroMod ICN OPC Server is installed along with ViZapp Software. Refer to the ViZapp
installation lab in the ViZapp Training Manual (IB-VIZAPP-TUT) for details.
3.3.3 Setting up Communications
We need to setup communications for communicating with the MOD 30ML or Modcell
instrument so that we can communicate with the instrument. You can use the built-in comm.
port of the MOD 30ML or add a comm. module to MOD 30ML or Modcell and use that port.
ViZapp lets you use the XModbus OPC Server or the ICN OPC Server to communicate with
the instrument. You need to have the right comm. port to use the OPC Server.
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