Javelin D
Ɣ
Model PD644 Voltmeter
Instruction Manual
40
Serial Communications (
serl
)
The meter is equipped with serial communications capability as a stan-
dard feature using PDC Serial Communication Protocol. The Modbus
®
RTU Protocol is optional and may be purchased at any time.
To communicate with a computer or other data communications equip-
ment which lacks an RS-485 interface, an RS-232 to RS-485 adapter
such as the Precision Digital PDA7485 is required. Please refer to
Or-
dering Information
on page 3 for details.
Serl
Prot
Addr
bAud
trde
When using more than one meter in a multi-drop mode, each meter
must be provided with its own unique address. The address may be
programmed from 00 to 99 for PDC protocol and from 1 to 247 for
Modbus
®
protocol. The transmit delay may be set between 0 and
199 ms.
Select Menu (
SElc
)
The
Select
menu is used to select the display intensity. Selection of
analog output is a factory setting depending on the option installed.
x
Output options are installed
and set up at the factory.
x
Changing the output selec-
tion will cause erroneous
operation.
seLc
out
intY
The
selection menu is for factory use only.
Do not change the selection!
Output
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