Mitsubishi Electric MELSEC FX3U Programming Manual page 391

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Cautions
1. Input specifications of the input
• An input device X000 to X007 specified as
- High speed counter
- Input interrupt
- Pulse catch
- DSZR instruction
- DVIT instruction
- ZRN instruction
• For one input, this instruction can be used only once.
• The maximum frequency of turning the inputs X000 to X007 ON and OFF is shown below:
- FX /FX
3U 3UC
Used input number
X000 to X005
X006,X007
*1. When receiving pulses within the response frequency range of 50 k to 100 kHz, perform the following
actions:
- Make sure that the wiring length is 5 m or less.
- Connect a bleeder resistor of 1.5 kΩ (1 W or more) to the input terminal, and make sure that the
load current in the open collector transistor output of the external equipment is 20 mA or more.
- FX PLCs
3G
Used input number
X000,X001,X003,X004
X002,X005,X006,X007
2. Occupied devices
1) When using the 16-bit operation
Three devices are occupied from a device specified in
2) When using the 32-bit operation
Six devices are occupied from a device specified in
3. When a word device is specified as
If the word device value is changed while the instruction is being executed, the change affects the operation
in every measurement cycle.
Function change depending on the version
The function of the FNC 56 instruction varies depending on the PLC version shown in the table below.
Applicable version
FX
3G
Ver.1.00 or later Ver.2.20 or later Ver.2.20 or later Addition of 32-bit instruction 32-bit operations (DSPD) are enabled.
S
1
PLC
FX PLC
3UC
*1
100 kHz
10 kHz
Maximum input
frequency
FX PLC
3G
60 kHz
10 kHz
S
FX FX
3U 3UC
13 High Speed Processing – FNC 50 to FNC 59
cannot overlap the following functions or instructions:
S
1
Maximum input frequency
FX PLC
3U
Main unit FX
*1
100 kHz
10 kHz
.
D
.
D
.
2
Item
13.7 FNC 56 – SPD / Speed Detection
-4HSX-ADP
3U
200 kHz
Outline of function
11
12
13
14
15
16
17
18
19
20
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