Omega DPF20 Series User Manual

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DPF20 Frequency, rate, total or period counter Instruction Manual
2.3.2 Conguraon menu
Speed
(kbps)
57.6 Kbps
...
...
to 600 bps
1 to 247
Address
Conguraon
Factory
conguraon
Version
AutomacDecimal point
Move with LE
Manual
Tools
Congure at menu ‘Conguraon’ (‘rtu’), the address value between
‘1’ and ‘247’ at parameter ‘Address’ (‘Addr’), bus speed in kbps at
parameter ‘Speed’ (‘bAud’) and data format at parameter ‘Format’
(‘bItS’).
Special tools are grouped inside the ‘Tools’ (‘TooL’) menu.
• the ‘Decimal point’ (‘dP’) menu is provided for compability with
ancient hardware that does not support decimal point retransmis-
sion. By default, select ‘Automac’ (‘Auto’). If your instrument
does nos transmit the decimal point posion, select ‘Manual’
(‘MAnL’) and x the posion of the decimal point manually.
• at the ‘Factory reset’ (‘FAct’) menu, select ‘yes’ to load the de-
fault factory conguraon for the instrument.
the ‘Version’ (‘VEr’) menu informs of the current rmware version
installed in the module.
The Modbus RTU protocol denes the following scenarios when a
‘Master’ is sending a frame to a ‘Slave’:
• the ‘Slave’ device receives the frame correctly and replies with the
requested data
• the ‘Slave’ devices detects a CRC error, parity error, or other. and
discards the frame without generang a reply frame. The ‘Master’
will detect a ‘TIMEOUT’ condion due to the absence of reply.
• the ‘Slave’ device receives the frame correctly, but replies with an
‘EXCEPTION_CODE’ as it can not process the funcon or register re-
quested.
The ‘EXCEPTION_CODES’ congured in the RTU module are :
2.3.3 Excepon codes
Excepon
code
Name Descripon
0 ILLEGAL_FUNCTION
Requested funcon is
not supported
1 ILLEGAL_DATA_ADDRESS
Requested register is
not supported
Table 12 - Excepon codes
Format
8 bits, no parity, 1 stop
8 bits, even parity, 1 stop
8 bits, odd parity, 1 stop
8 bits, no parity, 2 stop

Omega DPF20 Series Specifications

General

Brand	Omega
Model	DPF20 Series
Category	Measuring Instruments
Language	English