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(5) BFM #13, #12 Comparison value for YH output, BFM #15, #14 Comparison value for YS output

●

After comparing the current value of the counter with
the value written in BFM #13 and #12, BFM #15 and
#14, the hardware and software comparator in the FX-
1HC outputs the comparison result.

●

YH, YS output will not turn ON if you use PRESET or
the TO instruction to set the counter value equal to the
comparison value. It will turn ON only when a match
occurs by the counting of input pulses.

●

The YS comparison operation takes about 300

s, and

if a match occurs, the output goes ON.

●

Output occurs when the current value becomes equal
to the compare value but only if b1 and b2 of BFM #4
are ON. Once an output is set, it remains ON until it is
reset by b9 or b10 of BFM #4. If b3 of BFM #4 is ON,
however, one of the outputs is reset when the other is
set.

Current value

BFM #4

b9, b10

BFM #4

b9, b10

Coincidence output

(6) Counter current value (BFM #21, 20)
The current value of the counter can be read by the PC. It will not be the correct value during high-speed
operations because of the communication delay. The current value of the counter can be forcibly changed
by writing a 32-bit value into the appropriate BFMs from the PC.
(7) Maximum count value (BFM #23, 22)
These store the maximum and minimum value reached by the counter. If the power is turned off, the
stored data is cleared.
(8) Comparison status (BFM #26)

When ‘1’ (ON)

Set value

current value

Set value

current value

Set value

current value

BFM #26 is for reading only. Write commands from the programmable controller are ignored.
(9) Terminal status (BFM #27)

BFM #27

b4 to b15

When ‘0’ (OFF)

YH output is OFF.

YS output is OFF.

When ‘1’ (ON)

YH output is ON.

YS output is ON.

Undefined

BFM #26

When ‘0’ (OFF)

Set value

≤

current value

Set value

≠

current value

Set value

≥

current value

When ‘1’ (ON)

Set value

current value

Set value

current value

Set value

current value

BFM #26

When ‘0’ (OFF)

Set value

≤

current value

Set value

≠

current value

Set value

≥

current value

BFM #27

When ‘0’ (OFF)

PRESET input is OFF.

DISABLE input is OFF.

When ‘1’ (ON)

PRESET input is ON.

DISABLE input is ON.

Содержание MELSEC FX-1HC

Страница 1: ...selected using commands from the PC Allow the FX 1HC unit to run only after setting these mode parameters The source of your input signal should be a 1 or 2 phase encoder A 5V 12V or 24V power source can be used An initial value setting command input PRESET and a count prohibit command input DISABLE are also available The FX 1HC has two output When the counter value coincides with an output compar...

Страница 2: ...48 73 2 87 14 13 125 4 92 140 5 51 12 10 0 39 95 3 74 DISABLE terminal M3 5 0 14 screws YH YS terminal M3 5 0 14 screws Extension cable and connector POWER LED φA φB terminal M3 5 0 14 screws PRESET terminal M3 5 0 14 screws UP LED φA LED φB LED DN Down LED PRESET LED Mounting hole 2 φ5 5 0 22 Attachment groove for 3 5 1 38 wide DIN rail DIN rail clip DIS DISABLE LED YH LED YS LED ...

Страница 3: ... Using the solderless termination Use crimp terminals of the dimensions specified in the left figure Secure the terminals using a tightening torque of 0 5 to 0 8 N m 5 to 8 kg cm Wire only to the module terminals discussed in this manual Leave all thers vacant 6 8 mm 0 27 inches or less 6 8 mm 0 27 inches or less Class 3 grounding 100 Ω Extension cable FX 1HC PC 24V 0V SG 24V 0V External power sou...

Страница 4: ...y Pulse shape Output signal Counting specifi cation Format Range Comparison Type Output capacity Automatic UP DOWN however when on 1 phase 1 input mode UP DOWN is determined by a PC command or an input terminal When 32 bit is specified 2 147 483 648 to 2 147 483 647 When 16 bit is specified 0 to 65 535 upper limit can be user specified DC 12V to 24V 0 5A 8 point taken from the FX FX2C expansion bu...

Страница 5: ...imits are fixed values the upper limit is 2 147 483 647 and the lower limit is 2 147 483 648 16 bit counter modes A 16 bit binary counter handles only positive values from 0 to 65 535 Changes to zero from the upper limit or to the upper limit from zero when overflow occurs the upper limit is determined by BFMs 3 and 2 Lower limit 2 147 483 648 Ring length BFM 3 2 2 147 483 647 Upper limit Default ...

Страница 6: ... K1 c d Phase A Phase B OFF ON ON OFF UP DOWN Current value UP DOWN is determined by input phase A ON OFF Software UP DOWN K10 K11 Phase B input Phase A input ON OFF ON OFF 1 2 3 3 3 2 1 0 Phase A input 1 at OFF ON Phase B input 1 at OFF ON If both phase A and phase B inputs are received simultaneously the counter value dose not change e Phase A Phase B Phase B input ON OFF while phase A input ON ...

Страница 7: ...t to ON YS output is reset When b11 is set to ON YH output is set ON When b12 is set to ON YS output is set ON Stores the data that specifies the length of the 16 bit counter default K65 536 In the above example K100 is written into BFMs 3 and 2 of special block No 2 as a 32 bit binary value BFM 3 0 BFM 2 100 Permitted values K2 to K65 536 K1 D TO K2 K2 K100 X002 3 BFM 4 Command When 1 ON Count pe...

Страница 8: ...1 20 The current value of the counter can be read by the PC It will not be the correct value during high speed operations because of the communication delay The current value of the counter can be forcibly changed by writing a 32 bit value into the appropriate BFMs from the PC 7 Maximum count value BFM 23 22 These store the maximum and minimum value reached by the counter If the power is turned of...

Страница 9: ...r limit Set when the counter overflows the lower limit When the upper or lower limit is exceeded on a 32 bit counter When value ring length in 16 bit counter mode Set when the FROM TO command is used incorrectly Undefined There error flags can be reset by b8 of BFM 4 11 Model identification code number BFM 30 The identification number for a Special Function Block is read by using the FROM command ...

Страница 10: ...for 1 phase 1 input software determined UP DOWN counter K1000 BFM 13 12 Set the compare value for YH output K900 BFM 15 14 Set the compare value for YS output not necessary if only YH output is used Note that counting only occurs if count prohibit is OFF Also outputs will not be set from the counting process at all if the relevant output prohibit are set in the command register Please reset the er...

Страница 11: ...BFM 21 20 Minimum value BFM 25 24 Maximum value BFM 23 22 Comparisor data BFM 13 12 TO TO Comparison data BFM 15 14 1 Sampling cycle 300µs BFM 4 b1 BFM 4 b9 BFM 4 b2 BFM 4 b12 BFM 4 b11 BFM 4 b10 S R BFM 4 b3 YH YS S R Compare results BFM 26 Terminal status BFM 27 Matched Matched Error status BFM 29 for YH output Reset BFM 4 b8 for YS output φZ Initiali zation BFM 4 b4 TO Preset data BFM 11 10 Mod...

Страница 12: ...EMC If in doubt at any stage during the installation of the FX 1HC always consult a professional electrical engineer who is qualified and trained to the local and national standards If in doubt about the operation or use of the FX 1HC please consult the nearest Mitsubishi Electric distributor Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential damage that...

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