User manual for - TIMER SLC-94
7.2.7.
”rS-485” menu
This menu is connected with RS-485 interface, and sets his properties:
”Addr”
- this parameter defines the address of the device, accordingly to Modbus protocol.
It can be set in range from 0 to 199. If the value 0 is set then device, responds to
frames with address 255 (FFh).
”bAud”
- this parameter determines RS-485 interface baud rate. It can be set to one of 8
possible values:
”1200”
,
”2400”
,
”4800”,
”9600”
,
”19200”
,
”38004”
,
”57600”
,
”115200”
.
”mbAccE”
- this parameter sets the access to the configuration registers of the device.
Possible values:
”on”
- configuration registers can be set via RS-485 interface,
”oFF”
- configuration registers can not be set via RS-485 interface.
”rESP”
this parameter defines minimal (additional) delay between the Modbus message
and the answer of the device (received and sent via RS-485 interface). Modbus
protocol defines minimum delay between frames to 3.5 chars. Internal RISC
processor of
allows get very fast responses.
This additional delay allows
the device to work with poor RS-converters which do not works properly on higher
baud rates. Following values are available:
”Std” - answer as quick as possible, no additional delay
” 10c”
” 20c”
” 50c”
”100c”
”200c”
- answer delayed of 10, 20, 50, 100 of 200 chars respectively, where
one character time depends on selected baud rate
In the most cases parameter
”rESP”
should be set to
”Std”
(no additional delay).
Unfortunately for some third party RS-converters
”rESP”
should be adjusted
experimentally. Table below contains most frequently used values.
Parameter
”bAud”
“38.4”
“57.6”
“115.2”
Parameter
”rESP”
“ 10c”
“ 20c”
“ 50c”
Tab.7.1.
Settings of
”rESP”
parameter
7.2.8.
”briGHt” parameter
This parameter allows user to set bright of the LED display, bright can be set to
conventional values from 1 to 8.
22
i
