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Total Solution for Industrial Automation

16

CH 4. Functions

4.3

Controlling duty cycle (PWM) (Buffer Memory Offset 10 ~ 21)

The PWM provides functions to control the duty cycle from 0.0% to 100.0% with a
1/1000 resolution. Duty cycles can be controlled by a channel, for a maximum of 12
channels. Duty cycle can be set by using TO instruction at OFFSET 10~21 area of
buffer memory. For more information, please refer to Section 3.2.

When using TO instruction on the buffer memory, the output terminal will be
configured to set the duty cycle and being output. To prevent the drastic changes in
the duty cycle, please refer to the section on ramp control (Sec 4.4).

[Figure 7] Example of duty cycle control (PWM)

If 70.0% of duty cycle is set for a digital signal of 12V/24V voltage, an average
output of 8.4V/16.8V will be available. Duty cycle control(PWM) can be utilized in
various way to substitute analog signal. For example, the velocity of motor or the
ratio of valve opening (open/closed) can be configured.

Please note that if the value of the duty cycle is set to be greater than 100.0%, it
will be recognized as a 100.0%.

4.4

Ramp control

Ramp control serves the purpose of preventing drastic changes in the pulse
frequency and duty cycle. If ramp control is enabled (non-zero control time), the
output changes gradually. If it is disabled (control time is set to zero), output signals
change immediately, without any processing.

Please be advised that:

Ramp control time should be entered prior to the value for intended purposes.

In case of power reset or CPU STOP during ramp operation, enter the value again
by using TO instruction as all set value of buffer memory will be set back to initial
value(0).

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Содержание CM3-SP32PWM

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Страница 3: ...ser Caution This symbol describes situations that may cause minor injury or damage to the device SAFETY SYMBOLS USED IN THIS PRODUCT MEANS This symbol warns the user of potential hazards This symbol warns the user of uninsulated voltage within the unit that can cause dangerous electric shock Keep this manual nearby the user operating devices so it can be easily checked A class equipment Broadcasti...

Страница 4: ...re that the PLC CPU cannot detect such as in the relay or TR terminal Build an extra monitoring circuit that will monitor any output signal that could cause serious accidents A greater than normal current passed through the PLC for an extended period of time or a short circuited load flows in the output module may cause a fire Build a circuit that turns on the external power supply after the PLC p...

Страница 5: ...ectric shock fire or malfunctions After wiring work please make sure to close the terminal cover before turning on the power for the PLC system Precautions for wiring Warning Make sure to check the device s rated voltage and circuit arrangement before wiring Failure to do so may cause electric shock or damage on the device Make sure to close the terminal cover before turning on the power of PLC sy...

Страница 6: ...short or solder the battery Doing so could cause the battery to heat up rupture or ignite thereby harming the user Precautions for test run and repair Caution Do not dissociate the PCB from the module s casing or make any modifications to the device Doing so may cause fire electric shock or malfunction When mounting or separating the module make sure to turn off power to PLC and all other devices ...

Страница 7: ...Buffer Memory Offset 0 14 4 2 Controlling frequency Buffer Memory Offset 1 3 15 4 3 Controlling duty cycle PWM Buffer Memory Offset 10 21 16 4 4 Ramp control 16 4 4 1 Frequency ramp control Buffer memory Offset 5 7 17 4 4 2 Duty cycle ramp control Buffer memory Offset 30 41 18 5 Operating the PWM Output Module 19 5 1 Example for basic operation 19 5 2 Practical Examples 21 6 Maintenance work and r...

Страница 8: ...ions of the product Chapter 3 explains the types and features of the data memory stored in the product Chapter 4 goes over the capacities of the product and how to control the system Chapter 5 guides the user through programming examples of the product Chapter 6 explains repair and maintenance methods and how to operate the device safely In order to run the device properly the following specificat...

Страница 9: ...tion 3 PWM Output Module User s manual Run the CICON and make a connection with PLC Click the Online About PLC information or the icon below You can check the version of CPU firmware in the dialog box Figure 2 Route to check CPU firmware ...

Страница 10: ...l 4 channels as a group with one frequency for a total of 3 groups Programming of the PWM pulse frequency can be done up to 4000pps and the duty cycle of the output pulse range can be adjusted from 0 0 to 100 0 in 1 1000 resolution Moreover duty cycle can be controlled individually by each channel for up to and total of 12 duty cycles are able to be controlled individually In addition the product ...

Страница 11: ...Total Solution for Industrial Automation 5 PWM Output Module User s manual 1 2 Design and Dimensions Figure 3 PWM module appearance ...

Страница 12: ...rminal blocks and names Figure 4 Arrangement of terminals and its notations For long cables there is a potential for unintended distortion of the PWM pulse Therefore 1 0M cable is strongly recommended Each DC12 24V and DC GND are connected to the corresponding terminal internally ...

Страница 13: ...9 8 1G 0 075 10 times for each direction X Y Z Inner Impact Maximum impact acceleration 147 15G Impression time 11ms Pulse wave a sine half wave pulse 3 times for each direction X Y Z total on 3 times IEC61131 2 Inner Noise Square wave impulse noise 2kV 10 minutes CIMON Internal Test Standard Electromagnetism discharge Voltage 4kV Contact Discharge IEC61131 2 IEC61000 4 2 Radiation EMF Noise 27 50...

Страница 14: ... Specifications of item Rated input output voltage DC 12V 24V Response time 1ms Operating indicator LED lighting when the power ON Insulation for anticorrosion Photocoupler Input method Output method Source External connection circuit Internal circuit Table 2 I O Specification of PWM module ...

Страница 15: ...ory is an input output memory area which is provided by the module This area can be operated in the scan program The addresses of the X and Y are determined by the location where the module is mounted Please refer to Appendix 2 for details PWM output module can offer 32 pin output through the I O memory area Please refer to the table in 3 1 1 to check for more details of each point 3 1 1 Output ar...

Страница 16: ...or a general output Y36 General output Y27 Frequency A CH4 PWM output or a general output Y37 General output Y28 General output Y38 General output Y29 General output Y39 General output Y2A Frequency B CH5 PWM output or a general output Y3A General output Y2B Frequency B CH6 PWM output or a general output Y3B General output Y2C Frequency B CH7 PWM output or a general output Y3C General output Y2D F...

Страница 17: ...hannels 0 R W 1 CH1 2 3 4 Frequency 0 4000 pps 0 R W 2 CH5 6 7 8 Frequency 0 4000 0 R W 3 CH9 10 11 12 Frequency 0 4000 0 R W 4 Available Later 5 CH1 2 3 4 Frequency ramp control time x10ms Ex When Frequency ramp control time is set to 100 100 x 10ms 1 000ms 1sec 0 65535 x 10ms 0 R W 6 CH5 6 7 8 Frequency ramp control time x10ms 0 65535 0 R W 7 CH9 10 11 12 Frequency ramp control time x10ms 0 6553...

Страница 18: ...e ramp time x10ms 0 65535 0 R W 34 CH5 duty cycle ramp time x10ms 0 65535 0 R W 35 CH6 duty cycle ramp time x10ms 0 65535 0 R W 36 CH7 duty cycle ramp time x10ms 0 65535 0 R W 37 CH8 duty cycle ramp time x10ms 0 65535 0 R W 38 CH9 duty cycle ramp time x10ms 0 65535 0 R W 39 CH10 duty cycle ramp time x10ms 0 65535 0 R W 40 CH11 duty cycle ramp time x10ms 0 65535 0 R W 41 CH12 duty cycle ramp time x...

Страница 19: ... in 1 cycle pulse Figure 6 Definition of PWM output and duty cycle As illustrated above the PWM controls the output from minimum to maximum values by changing the duty cycle of the pulse CIMON PWM output module can be either general digital output or PWM output The general digital output can be used up to 32 pin points From these 32 pin points a total of 12 pin points support PWM output Also you c...

Страница 20: ...T 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 Buffer Memory Offset 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 Binary H0105 Disable CH 12 CH 11 CH 10 CH 9 CH 8 CH 7 CH 6 CH 5 CH 4 CH 3 CH 2 CH 1 Channel No Operates as below when M00 is ON a Enable the PWM output in CH1 CH3 CH9 b Set the frequency of CH1 as 1000pps c Set the duty cycle of CH1 as 50 0 In c...

Страница 21: ...h a single frequency Since three groups can be controlled three different frequency outputs will be feasible When using TO instruction on the buffer memory the output terminal outputs the designated frequency instantly To prevent drastic change of frequency please refer to the ramp control at 4 4 If the frequency value goes above 4000pps both valid range of the duty cycle and the degree of precisi...

Страница 22: ...gnal of 12V 24V voltage an average output of 8 4V 16 8V will be available Duty cycle control PWM can be utilized in various way to substitute analog signal For example the velocity of motor or the ratio of valve opening open closed can be configured Please note that if the value of the duty cycle is set to be greater than 100 0 it will be recognized as a 100 0 4 4 Ramp control Ramp control serves ...

Страница 23: ...anged during ramp operation the change will be applied not to the current operation but to the next operation In case of power reset or CPU STOP enter the value again by using TO instruction as all value of buffer memory will be set back to initial value 0 When M00 turns on operate as below a Input the frequency ramp control time value 300 3seconds to buffer memory Offset 5 by using TO instruction...

Страница 24: ...operation the change will be applied not to the current operation but to the next operation In case of power reset or CPU STOP enter the value again by using TO instruction as all value of buffer memory will be set back to initial value 0 When M00 turns on operate as below a Input duty cycle ramp control time value 500 5seconds to buffer memory Offset 30 by using TO instruction b Now if ramp cycle...

Страница 25: ...lue again by using TO instruction as all value of buffer memory will be set back to initial value 0 5 1 Example for basic operation This item is an example that changes the frequency and the duty cycle in channel 2 Y03 When M00 turns on the system operates below a Set duty cycle 50 0 so that gradually increase the frequency 0pps to 1000pps for 5 seconds b Gradually increase the duty cycle from 50 ...

Страница 26: ...hey can be changed 0pps to 1000pps for 5 seconds with a duty cycle of 50 0 3 Receive the M01 value Enter 900 on buffer memory Offset 11 and 300 on Offset31 by using TOP instruction The duty cycle changes from 50 0 to 90 0 for 3 seconds 4 Receive the M02 value Enter 400 on buffer memory Offset 1 and 300 on Offset5 by using TOP instruction The frequency changes from 1000pps to 400pps for 3 seconds 5...

Страница 27: ...should be able to identify the number of passengers on board by counting who have been in and out through escalator sensor Run the stepping motor when the number of passenger becomes 1 from 0 When the motor starts to run activated gradually increase the speed for 3 seconds then move to the maximum speed 4000pps later When the number of passenger on escalator becomes 0 wait 10 seconds then stop run...

Страница 28: ...ecrease the number of passenger D0 but only if the number is higher than 0 3 Check whether the number of passenger is 0 or higher than 0 4 In case the number of passenger is higher than 0 configure frequency to 4000pps As frequency ramp control time is set to 3 seconds frequency will gradually increase from 0pps to 4000pps for 3 seconds 5 Check whether the passenger is on board and if there are no...

Страница 29: ...ent of the system is as below Requirements Temperature value of the system should be controlled by PID control MV value should be applied to control every second The device should be controlled by the ON OFF button MV value with range from 0 to 16000 should be applied as range from 0 0 to 100 0 Duty cycle control Entire scan program is as below 1 Create a new PID program Example 2 PWM PID Control ...

Страница 30: ...using TOP instruction 4 Set frequency and frequency ramp control time Set 1 1pps to buffer memory Offset 1 and 0 frequency ramp control time to buffer memory Offset 5 by using TOP instruction 5 Configure the MV value from a range of 0 to 16000 to a range of 0 to 1000 Set range value of before to D210 and D211 by using MOV instruction 0 16000 6 Set the configured value to D212 and D213 by using MOV...

Страница 31: ... 25 PWM Output Module User s manual 7 Scale transform the MV value D102 by using SCL instruction and save the value to D200 8 Set the duty cycle by using configured D200 value Set D200 value to buffer memory Offset 11 by using TOP instruction ...

Страница 32: ...ff Problems on besides states 2 Link status of cable Check if the screws are tightly attached to the terminal of I O modules Maintenance There are items that should be checked once for twice every six months or a year Also it is required to do a maintenance work if there is a relocation of devices or shifts in wiring 1 General standard items Item Item to check Operating temperature 10 55 14 131 Op...

Страница 33: ...equires replacement due to damage or failure the following procedure should be followed a Turn the PLC drive power supply off b Isolate the connector from PLC S c Remove Din rail fixing hook and remove the PLC d Release PLC S fixing hook and remove replace the module Figure 8 Ejecting order in case of module replacement ...

Страница 34: ...ecrease accordingly See the following table for recommended actions when troubleshooting signal failures Recommended action for signal failures Error Remedy General output is disabled Check if the PLC module wired or mounted correctly Check that the buffer memory PWM enable channel per BIT is OFF The Y interface does not operate as general output in ON status PWM output is disabled Check if the PL...

Страница 35: ...n its manual to guide users 1 FROM FROMP instruction FROM FROMP instruction reads Word data from shared memory of special module and stores them to the internal device of CPU The data contain such as the converted value of AD module the temperature value of RTD or TC module etc The typical usage of the instruction can be represented by following LD Figure 9 How to use FROM FROMP instruction Form C...

Страница 36: ...d as base number and the lower Byte is assigned as slot number so can be easily understood with hexa decimal notation Keep in mind that base and slot numbers are 0 based and both the number of local base and the first slot are zero Base Number Slot S1 Local base Slot No 5 H0005 or 5 1st expansion Slot No 3 H0103 10th expansion Slot No 7 H0A07 14th expansion Slot No 12 H0D0C 16th expansion Slot No ...

Страница 37: ...base expansion 2 S2 Start address of buffer memory Designate the start address of buffer memory to read Please refer to the manual or quick reference guide of objective module 3 S3 Start address of device Designate the start address of device where read values will be stored Y M L K D Z areas are available 4 Number of words to read and store Designate the number of Words to read and store ...

Страница 38: ...1 Using FROM FROMP TO TOP Instructions The following is an example program which reads one word and eight words It assumes the special module is CM1 ADxxxx and installed in fourth slot of the first expanded base Example 1 How To Use FROM FROMP Instruction ...

Страница 39: ...nt value or start address of device where to write Device area or constant value where to write at Buffer memory of module S4 Length of words to write Write value starting at the designated area of S4 by turns as many as data word which will be written by Buffer memory address Table 10 Notation of TO TOP instruction in use and meaning of its form 1 S1 base and slot number Please refer to FROM FROM...

Страница 40: ...ctions 4 Number of words to write Designate the number of words to write The following is an example program which writes one word and eight words It assumes the special module is CM1 DAxxxx and installed in fourth slot of the first expanded base Example 2 How To Use TO TOP Instruction ...

Страница 41: ...Card No Device Symbol D Z T C Card No Notated in 4 digits of decimal number Example D1234 Z0001 T0011 C1023 3 Timer Counter Output Designation Composition Device Symbol Bit No Device Symbol T C Card No Notated in 4 digits of decimal number Example T0003 C0567 4 Step Controller Pin Designation Composition Device Symbol Card No Bit No Device Symbol S Card No Notated in 2 digits of decimal number Ste...

Страница 42: ... expanded base access from the local base Address number is allocated from left side excluding the power of each bases and CPU Address number starts from No 0 Analog Communication Special modules and empty slots occupy 16pins 1Word Figure 14 I O Address Allocation of CM1 Series Upper and PLC S Series Lower In case of PLC S Series I O Address Allocation is different from CM1 Series Please refer to ...

Страница 43: ...37 PWM Output Module User s manual 1 8 pin I O Module Composition POWER CPU 16 pin Input Module 16 pin Output Module 8 pin Input Module 8 pin Output Module 16 pin Input Module Figure 15 Example of CM1 Series Module Composition 8 pin I O Module ...

Страница 44: ...cation 2 32 pin I O Module 16 pin Module takes 1 slot and 32 pin Module takes 2 slots Composition POWER CPU 16 pin Input Module 16 pin Output Module 32 pin Input Module 32 pin Output Module 16 pin Input Module Figure 16 Example of CM1 Series Module Composition 32 pin I O Module ...

Страница 45: ...se of Additional CM1 Series Connection In case of PLC S CPU it has an I O function unlike the CM1 Series I O address allocation Address number is assigned in order from CPU PLC S CPU is separated into CM3 SP32MDTx and CM3 SP16MDRx CM3 SP32MDTx CPU occupies 32 pin of I O area and CM3 SP16MDRx uses 8 pin of both input and output but occupies 32 pin of I O area ...

Страница 46: ...endix 2 Method of Address Allocation Composition CPU 32pin 32 pin Input Module 32 pin Output Module 16 pin I O Module 16 pin I O Module Output 16pin Analog Module 16pin Communication Module 16pin Figure 18 Example of PLC S Series Module composition ...

Страница 47: ...default 2 I O Card under 16 pin occupies 16 pin 1Word 3 32 pin I O Card occupies 32 pin 2Word 4 Special Card except I O Card occupies 16 pin 1Word Ex It outputs Y20 when X00 is ON 2 Y area Bit Output Device This is an output pin which shows the result of calculation by Output Card Y area is Bit Type It means that the size of detailed table signifies the number of Bit In case it is used as Word Typ...

Страница 48: ...inside of PLC which enables to use the A B pin Output section Y only uses the A pin output Figure 19 Example of I O configuration Figure 20 I O Area Implementation Method As in Figure 19 X Y area have one to one responding area on the one pin of each I O Module While PLC is scanning it calculates with the memory X Y inside of the CPU regardless of status of I O Module After the calculation it outp...

Страница 49: ...ent 27p Figure 9 How to use FROM FROMP instruction 29p Figure 10 Example of PLC CM1 Series module extension 30p Figure 11 Example of PLC S Series module extension 31p Figure 12 How to use TO TOP instruction 33p Figure 13 Notation of each Bit Word device 35p Figure 14 I O Address Allocation of CM1 Series Upper and PLC S Series Lower 36p Figure 15 Example of CM1 Series Module Composition 8 pin I O M...

Страница 50: ... 4 Usage and meaning of each buffer memory PWM module 11p Table 5 Available point of PWM output 14p Table 6 Terminal No of the frequency group 15p Table 7 Valid set up range of Duty cycle upon the frequency range 15p Table 8 Notation and form of FROM FROMP instruction 29p Table 9 Example of setting slot number of extension function 30p Table 10 Notation of TO TOP instruction in use and meaning of ...

Страница 51: ...Total Solution for Industrial Automation 45 PWM Output Module User s manual Version History Released Date Version Description 22 09 2017 V1 0 First Edition ...

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Страница 56: ...Date 22 09 17 V1 0 ...

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