Panametrics DigitalFlow GS868, Programming Manual, Page: 40 / 146

Chapter 1. Programming Site Data
30 DigitalFlow™ GS868 Programming Manual (2-Channel)
1.8.4 Setting Up Serial Communications
The Model GS868 flowmeter can transmit stored data and displayed readings to a remote ANSI terminal or a
personal computer by connecting the meter’s RS232 interface to the serial port of the PC. In addition, the Model
GS868 can receive and execute remote commands via this link.The meter can also be configured with a MODBUS
option card for MODBUS (RS485) communications, a Foundation Fieldbus option card for Foundation Fieldbus
communications, an Ethernet option card for Ethernet communications, or with a MODBUS/TCP option card for
MODBUS communications over the Ethernet, if desired.
Note: To set Fieldbus communications parameters, see Appendix D, Foundation Fieldbus Communications.
Use the COMM submenu to set the RS232, MODBUS, Ethernet and MODBUS/TCP communications port parameters
and to enter a network identification number.T A network identification number is required to use the
PanametricsPanametrics Instrument Data Manager or PanaView software. While following the programming
instructions, refer to the menu map in Figure 13 on page 85 .
1. To enter the COMM submenu, press [F4] at the Global PROGRAM screen.
2. Use the

]
and
 
] and [F1]-[F4] keys to select the desired
Baud Rate. The available rates are 300, 600, 1200,
2400, 4800, 9600 and 19,200 baud.
3. Use the

]
and


] and [F1]-[F4] keys to select the number of UART Bits, as shown in Table 11 below.
4. Enter a
Network ID number between 1 and 254 and press
[ENT] . The default number is 1.
A network ID number is only necessary for communication with the Panametrics Instrument Data Manager or
PanaView software. See the software User’s Manual for more information.
IMPORTANT: If the network ID number is changed, communication with the Instrument Data Manager or PanaView
must be re-established with the new ID number.
1.8.4.1 MODBUS (RS485) Parameters
If your GS868 does not include an option card for MODBUS communications, you have completed programming the
COMM submenu. However, if you have installed a MODBUS option card, the following additional prompts appear.
1. Press [F1]-[F4] to select the desired
MODBUS Baud Rate from four selections: 2400, 4800, 9600 and 19,200.
2. Press [F1]-[F3] to set the MODBUS Parity as none, odd or even.
3. Press [F1] to select one
MODBUS Stop Bit, or
[F2] to select two stop bits.
4. Use the numeric keys to enter a MODBUS Address (from 1 to 247) and press [ENT].
1.8.4.2 MODBUS/TCP Parameters
If your GS868 does not include an option card for MODBUS/TCP communications, you have completed programming
the COMM submenu. However, if you have installed a MODBUS/TCP option card, complete the following steps:
1. Press [F3] to select the appropriate
MODBUS Baud Rate of 9600.
2. Press [F1]-[F3] to set the MODBUS Parity as none, odd or even.
3. Press [F1] to select one
MODBUS Stop Bit, or
[F2] to select two stop bits.
4. Use the numeric keys to enter a MODBUS Address (from 1 to 247) and press [ENT].
Table 11: UART Bits Options
Option Bar # Data Bits # Stop Bits Parity
8,no 8 0 None
8,odd 8 0 Odd
8even 8 0 Even
7,odd 7 1 Odd
7even 7 1 Even