Red Lion PAX2S - Manual (Page 22)

22
COMMUNICATIONS TYPE
Mbrtu - Modbus RTU
MbASC - Modbus ASCII
rLC - RLC Protocol (ASCII)
Select the desired communications protocol. Modbus is preferred as it
provides access to all meter values and parameters. Since the Modbus protocol
is included within the PAX2S, the PAX Modbus option card, PAXCDC4, should
not be used. The PAXCDC1 (RS485), or PAXCDC2 (RS232) card should be
used instead.
BAUD RATE
1200 4800 19200
2400 9600 38400
Set the baud rate to match the other serial communications equipment on the
serial link. Normally, the baud rate is set to the highest value that all the serial
equipment are capable of transmitting and receiving.
DATA BIT
7 8
Select either 7 or 8 bit data word lengths. Set the word length to match the
other serial communications equipment on the serial link. For Mbrtu
communication type, data bit setting is fixed at 8 bits.
PARITY BIT
NO EUEN Odd
Set the parity bit to match that of the other serial communications equipment
on the serial link. The meter ignores the parity when receiving data and sets the
parity bit for outgoing data. If no parity is selected with 7 bit word length, an
additional stop bit is used to force the frame size to 10 bits. Parity is not
available if dAtA is set for 8 bit.
METER UNIT ADDRESS
1 to 247 - Modbus
0 to 99 - RLC Protocol
Select a Unit Address that does not match an address number of any other
equipment on the serial link.
TRANSMIT DELAY
0.000 to 0.250 seconds
Following a Modbus command or RLC Transmit Value command, the
PAX2S will wait this minimum amount of time in seconds before issuing a serial
response
tYPE
MbASC
SRL
bAUd
38400
SRL
dAtA
8
SRL
PArItY
NO
SRL
Addr
247
SRL
dELAY
0.010
SRL
C
OmmuniCaTiOns
p
OrT
p
arameTers
(Port)
PORT SELECT
USb SErIAL
Select the Communications Port to be programmed.
Port
USb
USB PORT PARAMETERS (USb)
USB CONFIGURATION
AUtO SErIAL
AUtO Meter automatically configures USB port settings to operate
with Crimson configuration software. When a USB cable is
attached to PAX2S and PC, the port is internally set to
Modbus RTU protocol, 38400 baud, 8 bits, and Unit Address
247. The Serial Port settings programmed below will not
change, or show this.
SErIAL Configures USB port to utilize the Serial Port settings and
protocol programmed below.
CONFIG
AUtO
USb
Port
SErIAL
tYPE
MbASC
Comms
Type
dAtA
8
SRL
Data Bit
bAUd
38400
SRL
Baud Rate
PArItY
NO
SRL
Parity Bit Meter
Address
Addr
247
SRL dELAY
0.010
SRL
Transmit
Delay
Abrv
NO
SRL
Abbreviated
Printing
SRL OPt
NO
Print
Options
SRL Pro
Port
Pro
NO
F1 F2
P
D
rLC type only
SERIAL PORT PARAMETERS (SErIAL)
To select SErIAL, an optional communication card must be installed.