Instruction manual

accQcomm Interface Module
Section 1 Introduction
1-2
1.2 Outputs The accQcomm has an array of outputs for different data types,
summarized below. For detailed information about each output
and its configuration, see section 2, Installation and Operation.
LCD The LCD on the front of the unit can be configured to display
System Information (device name, firmware, and date/time),
data output for each flow meter (flow, totalized flow, velocity,
level, and temperature in user selectable units), and 4-20 mA
outputs.
LED indicators The LED lights indicate the accQcomm’s activity. They signal
power, the presence of alarm conditions, serial transmit/receive,
and Ethernet activity.
4-20 mA outputs The accQcomm has up to four 4-20mA analog outputs (specified
at time of order). The analog outputs can be assigned to any data
type from one to three connected flow meters. Sums and/or
averages can be selected as an analog output.
Relay alarms The accQcomm has eight programmable relays for triggering
alarms based on user-defined conditions.
Web viewing Data from all connected flow meters can be viewed on the Web by
logging on to the fixed IP address of your accQcomm module.
MODBUS protocol MODBUS communication provides a standard protocol that can
be used to retrieve real-time data from one to three connected
Isco flow meters. The data can be sent to a central computer for
display, data collection, or process control. The accQcomm can
send MODBUS data using either the RS232 or RS485 connector
on the front panel.
MODBUS is a simple command/response mechanism to read
from and write to specific memory locations called registers. A
register is a holding place for a piece of digital information within
the equipment. A table of MODBUS register addresses and their
data types is provided in Appendix A, Table A-3.
The Isco ADFM flow meters can use either MODBUS ASCII or
RTU protocol.
1.3 Cables and
Connectors
Figure 1-1 shows the locations and functions of all of the
accQcomm’s connectors, as well as Isco part numbers for the
appropriate connecting cables where used.
Note
Negative System Power must be connected to Chassis
Ground, and should be Earth-Grounded.