Emerson Micro Motion 3711 Configuration And Use Manual page 36

Setting Up Communications
5. On the General panel, configure parameters as required (see Table 4-1). Parameters set here
apply to both the serial communications card and the dial-up modem card.
Table 4-1 Comm Port – General panel
Parameter Description
Baud Rate Send and receive bits per second
Parity Type of parity check to be performed
Data Bits • 7 (used by Modbus ASCII)
• 8 (used by Modbus RTU and ROC protocol)
Stop Bits Number of stop bits in each character
Key On Delay Specify the number of seconds that will elapse between the
time that the RTS signal is turned on and the time that message
transmission begins.
Key Off Delay Specify the number of seconds that will elapse between the
time that message transmission is finished and the time that the
RTS signal is turned off.
Valid Receive Displays the number of valid messages that have been received
Counter by this port.
Idle Time Specify the number of milliseconds that the Model 3711 will
delay, after receipt of the last character, before beginning
processing.
6. If you are configuring the dial-up modem card:
a. Click the
b.
Modem Type
Note: You may also use an external modem. In this case, set Modem Type to External and configure
all other parameters as required.
c. Set other parameters as required. Modem parameters are listed and defined in Table 4-2.
28
tab. The Modem panel is displayed (see Figure 4-2).
Modem
is automatically set to
Comments
The PC COM port must be
configured to match this setting.
• ROCLINK 800 automatically
• Other hosts may or may not
The PC COM port must be
configured to match this setting.
• ROCLINK 800 automatically
• Other hosts may or may not
Must match the value configured
for the PC COM port.
• ROCLINK 800 always uses 8
• Other hosts may require either 7
The PC COM port must be
configured to match this setting.
• ROCLINK 800 automatically
• Other hosts may or may not
Set to 0 initially, then add delay as
required.
Set to 0 initially, then add delay as
required.
May be reset to 0 or any other
desired start value.
.
Internal
Micro Motion
adjusts the PC COM port to
match this setting.
auto-adjust.
adjusts the PC COM port to
match this setting.
auto-adjust.
data bits, and does not
auto-adjust the PC COM port.
or 8 data bits.
adjusts the PC COM port to
match this setting.
auto-adjust.
®
Model 3711 Gas Flow Computers