Manual Mode; Data Communication - Brainchild P41 User Manual

3 -12 Manual Mode

3 -12 Manual Mode
Operation:
To enable manual control the password PASS should be set with a To enable manual control the password PASS should be set with a
value equal to CODE (except CODE=0 ) . value equal to CODE (except CODE=0 ) .
Press Press key to get key to get
to obtain to obtain
now enters the manual mode. The upper display will begin to flash now enters the manual mode. The upper display will begin to flash
and the lower display will show and the lower display will show
indicates control percentage value for heating output and indicates control percentage value for heating output and
indicates control percentage value for cooling output. Now you can indicates control percentage value for cooling output. Now you can
use up and down key to adjust the percentage values for the heating use up and down key to adjust the percentage values for the heating
or cooling output. The controller performs open loop control as long or cooling output. The controller performs open loop control as long
as it stays in manual mode. as it stays in manual mode.
Exit Manaul Made Exit Manaul Made
To press both To press both
mode and show home display. mode and show home display.

3 - 13 Data Communication

3 - 13 Data Communication
The controllers support
communication. Other protocols are not available for the series.
Two types of interface are available for Data Communication. These are Two types of interface are available for Data Communication. These are
485 485 and and RS-232 RS-232
drive and sense signal instead of a single ended architecture which is used drive and sense signal instead of a single ended architecture which is used
for RS-232, RS-485 is less sensitive to the noise and suitable for a longer for RS-232, RS-485 is less sensitive to the noise and suitable for a longer
distance communication. RS-485 can communicate without error over 1 km distance communication. RS-485 can communicate without error over 1 km
distance while RS-232 is not recommended for a distance over 20 meters. distance while RS-232 is not recommended for a distance over 20 meters.
Using a PC for data communication is the most economic way. The signal Using a PC for data communication is the most economic way. The signal
is transmitted and received through the PC communication Port ( generally is transmitted and received through the PC communication Port ( generally
RS-232 ). Since a standard PC can't support RS-485 port, a network RS-232 ). Since a standard PC can't support RS-485 port, a network
adaptor ( such as adaptor ( such as
RS-232 for a PC if RS-485 is required for the data communication. But there RS-232 for a PC if RS-485 is required for the data communication. But there
is no need to be sad. Many RS-485 units ( up to 247 units ) can be is no need to be sad. Many RS-485 units ( up to 247 units ) can be
connected to one RS-232 port, therefore a PC with 4 comm ports can connected to one RS-232 port, therefore a PC with 4 comm ports can
communicate with 988 units. It is quite economic. communicate with 988 units. It is quite economic.
62
(mode select), then use (mode select), then use
(Man ). Then press (Man ). Then press
and and keys , the controller will revert to static keys , the controller will revert to static
RTU mode of
interface. Since RS-485 uses a differential architecture to interface. Since RS-485 uses a differential architecture to
SNA10A SNA10B SNA10A SNA10B , ,
key for 5 seconds, the unit key for 5 seconds, the unit
or or
Modbus protocol for the data
) has to be used to convert RS-485 to ) has to be used to convert RS-485 to
UM0P411A
and and
. .
RS- RS-
keys keys