2104349 rev. AD
Page 1
–7
Communications
Transmitting Data: Sending a response.
Receiving Data: Processing request.
!
Negative Acknowledgement (Nak) w/packet list.
+
Positive Acknowledge (Ack) of receipt of request.
Waiting for Positive Acknowledgement: Waiting for response after transmission.
?
Exception Alarm Processing.
ID Recognized: Recognized and receiving request.
Listen Cycle: Flashes if this remote port is active and running Totalflow Remote Protocol.
Flashes in sync with listening cycle that occurs at 1, 2 or 4 second intervals. May not be
visible if baud rate is faster than 2400. Annunciator will remain on if listen cycle is set to zero.
M
MODBUS ASCII: MODBUS ASCII protocol selected for the port assigned to this annunciator.
m
MODBUS RTU: MODBUS RTU protocol is selected for the port assigned to this annunciator.
L
Local Protocol: Displayed when PCCU32 port is active and running Totalflow Local Protocol.
n
Network (Ethernet).
u
USB.
Measurement Application
BF
Back Flow Condition: Visible only when DP variable displayed.
Z
Zero Flow Condition: Visible only when Flow Rate displayed.
H
Hold: Displayed when PCCU32 has entered Calibration mode on a Measurement Application.
A
Alarm Condition: Need to view alarm. The user may need to compare application limits to
current values to determine where the alarm condition is present.
AD
A to D Failure: Displayed if A to D Converter’s differential pressure, absolute static pressure or
temperature readings exceed maximum counts or are less than minimum counts.
1.2
Computer hardware
The G4 EX computers are housed in an explosion-proof enclosure. The
components that comprise this are as follows:
-
G4 EX enclosure (3R/IP53 with breather drain installed; 4X/IP66 without
breather installed)
-
G4 EX main processor board
-
G4 EX termination board
-
Lithium battery
-
Engine Card
-
G4 EX Liquid Crystal Display (LCD) Assembly
-
PCCU Connector
-
Internal Connector
-
Explosion Proof External Connector
– USB/Miltary (optional)
-
Explosion Proof integral multivariable transducer with Raw Sensor board
Interface
-
Resistive Temperature Detector
-
Standard RTD (DIV 2)
-
Explosion Proof RTD (DIV 1)
Summary of Contents for XSeries G4 6200
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