
User Manual UMAX030541. Version V1 13-116
When using any control source as the X-Axis input to a function block, the corresponding
scaling limits are defined as per Table 7. It is the responsibility of the user to make sure
that the scaling objects for any function block are setup appropriately depending on the
source selected for the X-Axis input.
Control Source
Scaling 1
Scaling 2
Dec Digits
CANopen® Message
– Num 1 to 4
7320h
7322h
6302h
CANopen® Message
– Num 5 to 10
2520h
2522h
2502h
Constant Function Block
N/A
N/A
N/A (float)
Lookup Table yz Function Block
(where yz = 01 to 12)
0 or lowest
from 3yz6h
(*)
100 or highest
from 3yz6h
(**)
3yz3h
Mathematical Function
4021h
4023h
4032h
Programmable Logic Function
0%
100%
1 (fixed)
Output Commanded Field Value
7320h
7322h
6302h
Output Feedback Field Value
7320h
7322h
6302h
Power Supply Measured
N/A
N/A
1 (fixed)
Processor Temperature Measured
N/A
N/A
1 (fixed)
(*) - Whichever value is smaller; (**) - Whichever value is larger
Table 7
– Scaling Limits per Control Source
As shown in Figure 5, the Output FV will be calculated based on the FV scaling selected.
Since 7321h represents the value at or below the lowest control input received, it
represents the minimum field value that will be applied at the output. Similarly, 7323h
represents the maximum FV that will be applied.
While (7320h < 7322h) must always hold true, in order to get an inverse response (i.e.
output decreases as the input increased), simply set 7321h higher than 7323h.
In general, the profile shown in Figure 5 holds true. However, in some cases it may be
desired that the minimum offset not to be applied when the value is outside of the range,
i.e. when using a joystick profile with a deadband. For this reason, object 2342h
AO
Control Response
has the options shown in Table 8.
Value Meaning
0
Single Output Profile (Figure 5)
1
Output OFF below Scaling 1 PV
2
Output OFF above Scaling 2 PV
Table 8
– Object 2342 - AO Control Response Options