Yokogawa Electric Corporation - TC10 - ENGINEERING MANUAL - PAG. 18
[80] SP 2 - Set Point 2
Available:
When at least one output is programmed as con-
trol output and [76] nSP
> 2.
Range:
From [77] SPLL to [78] SPHL engineering units.
[81] SP 3 - Set Point 3
Available:
When at least one output is programmed as con-
trol output and [76] nSP
> 3.
Range:
From [77] SPLL to [78] SPHL engineering units.
[82] SP 4 - Set Point 4
Available:
When at least one output is programmed as con-
trol output and [76] nSP =4.
Range:
From [77] SPLL to [78] SPHL engineering units.
[83] A.SP - Selection of the active Set point
Available:
When at least one output is programmed as
control output.
Range:
From “SP” to [76] nSP.
Notes: 1.
A [83] A.SP change produces the following actions:
• When [84] SP.rt = SP - the remote set point
will
be forced to be equal to the active set point;
• When [84] SP.rt = trin - the remote set point will
be forced to zero;
• When [84] SP.rt = PErc - the remote set point
will be forced to zero.
2.
SP2, SP3 and SP4 selection will be shown
only when the relative set point is enabled (see
[76] nSP parameter).
[84] SP.rt - Remote set point type
These instruments will communicate with each other, using
RS 485 serial interface without a PC. An instrument can be
set as a Master while the other are (as usual) Slave units. The
Master unit can send his operative set point to the slave units.
In this way, for example, is possible to change simultaneously
the set point of 20 instruments by changing the set point of the
master unit (e.g. hot runner application).
SP.rt parameter defines how the slaves units will use the value
coming from serial link.
[133] tr.SP parameter [selection of the value to be retransmitted
(Master)] allows to define the value sent by master unit.
Available:
When at least one output is e programmed as
control output and the serial interface is present.
Range:
rSP =
The value coming from serial link is used
as remote set point (RSP);
trin =
The value coming from serial link will be
algebraically added to the local set point
selected by A.SP and the sum becomes
the operative set point;
PErc = The value coming from serial will be scaled
on the input range and this value will be
used as remote set point.
Note:
A [84] SPrt change produces the following actions:
• When [84] SP.rt = rSP - the remote set point will be
forced to be equal to the active set point;
• When [84] SP.rt = trin - the remote set point will
be forced to zero;
• When [84] SP.rt = PErc - the remote set point will
be forced to zero.
Example:
A 6 zone reflow-oven for PCB.
The master unit sends its set point value to 5 other zones
(slave controllers).
The Slave zones use it as a set point trim.
The first zone is the master zone and it uses a set point
equal to 210°C.
The second zone has a local set point equal to -45°C.
The third zone has a local set point equal to -45 (°C).
The fourth zone has a local set point equal to -30.
The fifth zone has a local set point equal to +40.
The sixth zone has a local set point equal to +50.
In this way, the thermal profile will be the following:
–
Master SP = 210°C;
–
Second zone SP = 210 -45 = 165°C;
–
Third zone SP = 210 -45 = 165°C;
–
Fourth zone SP = 210 - 30 = 180°C;
–
Fifth zone SP = 210 + 40 = 250°C;
–
Sixth zone SP = 210 + 50 = 260°C.
Changing the SP of the master unit, all the other slave units
will immediately change their operative set point.
[85] SPLr - Local/remote set point selection
Available:
When at least one output is programmed as
control output.
Range:
Loc =
Local set point selected by [83] A.SP;
rEn =
Remote set point (coming from serial link).
[86] SP.u - Rate of rise for positive set point
change
(ramp up)
Available:
When at least one output is e programmed as
control output.
Range: •
0.01 to 99.99 units per minute;
•
inF = ramp disabled (step transfer).
[87] SP.d - Rate of rise for negative set point
change
(ramp down)
Available:
When at least one output is e programmed as
control output.
Range:
0.01 to 99.99 units per minute;
inF =
ramp disabled (step transfer).
General note about remote set point: when the remote set
point (RSP) with trim action is programmed, the local set
point range becomes the following:
from [77] SPLL+ RSP to [78] SPHL - RSP
]
PAn group - Operator HMI
[118] PAS2 - Level 2 password: Limited access level
Available:
Always.
Range:
oFF = Level 2 not protected by password
(as level 1 = Operator level);
1 to 200.
[119] PAS3 - Level 3 password:
Complete configuration level
Available:
Always.
Range:
3 to 200.
Note:
Setting [118] PAS2 equal to [119] PAS3, the level 2
will be masked.
[120] PAS4 - Level 4 password:
CODE configuration level
Available:
Always.
Range:
201 to 400.
