3 -13 Manual Control
3 -13 Manual Control
Operation:
To enable manual control, the LOCK parameter should be set to NONE, then press
several times
then
(Heating output)or
(Cooling output) will appear on the display. Press
for 3
seconds then the display will begin to flash. The controller now enters the manual control mode.
indicates output control variable for output 1, and
indicates control variable for output 2.
Now you can use up-down key to adjust the percentage values for the heating or cooling output.
The controller performs open loop control as long as it stays in manual control mode.
To enable manual control, the LOCK parameter should be set to NONE, then press
several times
then
(Heating output)or
(Cooling output) will appear on the display. Press
for 3
seconds then the display will begin to flash. The controller now enters the manual control mode.
indicates output control variable for output 1, and
indicates control variable for output 2.
Now you can use up-down key to adjust the percentage values for the heating or cooling output.
The controller performs open loop control as long as it stays in manual control mode.
Exit Manual Control
Exit Manual Control
Press the
keys and the controller will revert to its normal display mode.
Press the
keys and the controller will revert to its normal display mode.
28
Two types of interfaces are available for Data Communication. These are
and
interface. Since RS-485
uses a differential architecture to 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 distance communication. RS-485 can
communicate without error over 1 km distance while RS-232 is not recommended for a distance over 20 meters.
RS-485
RS-232
Two types of interfaces are available for Data Communication. These are
and
interface. Since RS-485
uses a differential architecture to 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 distance communication. RS-485 can
communicate without error over 1 km distance while RS-232 is not recommended for a distance over 20 meters.
RS-485
RS-232
Using a PC for data communication is the most economic way. The signal is transmitted and received through the
PC communication Port ( generally RS-232 ). Since a standard PC can't support RS-485 port, a network adaptor (
such as
,
) has to be used to convert RS-485 to 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 connected to one RS-
232 port, therefore a PC outfitted with 4 comm ports can communicate with up to 988 units. Communications
encompass a large scope of applications from single point interface through hundreds of controls to historical
trending through endless zones. ETR communications provide for a very powerful and economic solution.
SNA10A SNA10B
Using a PC for data communication is the most economic way. The signal is transmitted and received through the
PC communication Port ( generally RS-232 ). Since a standard PC can't support RS-485 port, a network adaptor (
such as
,
) has to be used to convert RS-485 to 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 connected to one RS-
232 port, therefore a PC outfitted with 4 comm ports can communicate with up to 988 units. Communications
encompass a large scope of applications from single point interface through hundreds of controls to historical
trending through endless zones. ETR communications provide for a very powerful and economic solution.
SNA10A SNA10B
Setup
Enter the setup menu.
Select RTU for COMM . Set individual addresses for each unit which is connected to the same port.
Set the Baud Rate ( BAUD ), Data Bit ( DATA ), Parity Bit ( PARI ) and Stop Bit ( STOP ) such that these values are
accordant with PC setup conditions.
Enter the setup menu.
Select RTU for COMM . Set individual addresses for each unit which is connected to the same port.
Set the Baud Rate ( BAUD ), Data Bit ( DATA ), Parity Bit ( PARI ) and Stop Bit ( STOP ) such that these values are
accordant with PC setup conditions.
If you use a conventional 9-pin RS-232 cable instead of CC94-1, the cable should be modified for proper operation
of RS-232 communication according to Section 2-9.
Please see the communications supplement for more detailed information.
If you use a conventional 9-pin RS-232 cable instead of CC94-1, the cable should be modified for proper operation
of RS-232 communication according to Section 2-9.
Please see the communications supplement for more detailed information.
3-14 Data Communication
3-14 Data Communication
The controllers support
mode of
protocol for the data communication. Other protocols are not available
for this series.
RTU
Modbus
The controllers support
mode of
protocol for the data communication. Other protocols are not available
for this series.
RTU
Modbus
