Yokogawa Data Acquisition with PID Control CX2000 User Manual
Page 235
9-2
IM 04L31A01-17E
Various Setting Displays for the Green Series Communication Function
Parameters can be entered on various displays including External loop setting (Basic
setting), External loop setting (Parameter address setting), and External loop setting
(Tuning setting) displays. For details on each display, see the following sections.
External Loop Setting (Basic Setting) Display
• When the connecting model is UT Series
•
Various setup information can be automatically read from the connected
device. If you specify the [Modbus address] on the External loop setting (Basic
setting) display and execute [Auto reading], the CX, which is set to be the
Modbus master, reads the following setup information from the connected
device automatically.
1.
Decimal point position and unit of PV, SP, and OUT values.
2.
High and low limits of the control span.
3.
Control mode (single loop control, cascade control, etc.). Referred to as
UT mode on the UT series.
4.
Control output type.
5.
Alarm type.
•
The setup information can also be entered using the operation keys.
•
Based on the setup information that is automatically read, [Parameter address
setting] and [Tuning setting] are also automatically set.
• When the connecting model is “ETC”
Auto reading cannot be performed. You can only enter the items of 1 and 2 above
using the operation keys.
External Loop Setting (Parameter Address Setting) Display
You can set the register address of the setup information that is required for
monitoring on the control group display, control overview display, and tuning display.
• When the connecting model is UT Series
•
If [Auto setting] is executed, the register addresses of the following setup
information are set automatically according to the various information that was
read automatically on the External loop setting (Basic setting) display. The
register addresses are set automatically also by executing [Auto reading] on
the External loop setting (Basic setting) display.
1.
PV: Process value
2.
SP: (Target) Setpoint
3.
OUT: Output
4.
Control mode
5.
Remote/Local
6.
Operation STOP/RUN
7.
Alarm status
8.
SP number
9.
PID number
10. Auto reading
•
The setup information can also be entered using the operation keys.
• When the connecting model is “ETC”
Automatic setting is not possible. You can only enter the items of 1, 2, and 3
above using the operation keys.
9.1 Specifications of the Green Series Communication Function