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6. Function blocks
6.1 Manufacturer function blocks
Scan time Tc
The TC input defines the time between the function block calls. Values between 0.1s
and 6553.5s can be defined.
If the TC scan time is set to 0, the program cycle time defines the time difference
between the function block calls. This may cause irregularities in the control response
as the program cycle time is not always constant. The ST (set cycle time) function
block should be used to set a constant program cycle time, please refer to → "ST - SET
cycle time", page 403.
A combination of two devices easyE4 is ideal for applications
requiring lengthy calculations or visualizations such as PID
closed-loop control tasks with the PID controller and also visu-
alization functions at the same time.
In these kinds of applications, move the time consuming cal-
culations to a second device, possibly without an integrated
display, which you can connect via NET.
Assigning operands
You can assign the following operands to the function block inputs that are numeric
inputs.
Operands
Value inputs
Constant, timer constant
x
MD, MW, MB - Markers
x
NB, NW, ND - NET markers
x
nNB, nND, nND- NET markers
NET stations n
x
IA - Analog input
x
QA - Analog output
x
QV - QV - Numeric output of a FB
x
You can assign the following operands to the function block inputs that are bit inputs:
Operands
Bit inputs
Constant 0, constant 1
x
M – Markers
x
RN - Input bit via NET
x
SN - Output bit via NET (send)
x
N - Net marker bit
x
nN - NET marker bit NET station n
x
ID: Diagnostic alarm
x
LE - Output backlight
x
P buttons
x
I - Bit input
x
Q - Bit output
x
Q - Bit output of a FB
x
easyE4
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Содержание easyE4 series
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Страница 22: ...0 1 About this manual 18 easyE4 11 18 MN050009 EN www eaton com...
Страница 40: ...1 easyE4 control relays description 1 10 Safety regulations 36 easyE4 11 18 MN050009 EN www eaton com...
Страница 169: ...easyE4 11 18 MN050009 EN www eaton com 165...
Страница 462: ...6 Function blocks 6 4 Timing and counter relay example 458 easyE4 11 18 MN050009 EN www eaton com...
Страница 490: ...7 System settings 7 16 Time and Date setting 486 easyE4 11 18 MN050009 EN www eaton com...
Страница 520: ...9 easyE4 inside 9 7 NET network 516 easyE4 11 18 MN050009 EN www eaton com...
Страница 524: ...10 Diagnostics messages of the operating system 10 2 Diagnostics buffer 520 easyE4 11 18 MN050009 EN www eaton com...
Страница 570: ...11 Connection to other devices 11 6 E mail function 566 easyE4 11 18 MN050009 EN www eaton com...
Страница 578: ...12 Faults 12 4 Functionality of the NET faulty 574 easyE4 11 18 MN050009 EN www eaton com...
Страница 582: ...13 Maintenance 13 3 Storage transport and disposal 578 easyE4 11 18 MN050009 EN www eaton com...
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