Instruction Manual

Trident Model PD765 Universal Input Meter Instruction Manual
54
Noise Filter Bypass (byps)
The meter can be programmed to filter small input changes, but allow
larger input changes to be displayed immediately, by setting the bypass
value accordingly.
If the input signal goes beyond the bypass value, it will be displayed
immediately with no averaging done on it.
The noise filter bypass value may be set anywhere from 0.2 to 99.9. It
corresponds to percentage of full scale for process inputs and to de-
grees Fahrenheit for temperature inputs.
Increasing the bypass value may slow down the display response to
changes on the input signal.
Serial Communications (
serl)
The meter is equipped with serial communications capability as a
standard feature using PDC Serial Communication Protocol. The Mod-
bus RTU protocol is included on all models after 5/1/2010. To communi-
cate with a computer or other data terminal equipment, an RS-232 or
RS-485 adapter option is required; see Ordering 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 (see Serial Communication Adapter manual for more details).
The Trident can also be connected directly to another Trident meter
through a cable assembly (PDA7420). This allows the user to copy all
the settings from one meter to another, using the Copy function.
Protocol Selection Menu (Prot)
The Protocol selection menu is used to select either the PDC or the
Modbus protocol.