Shimaden PAC46 Series User manual

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PAC46 Series
THYRISTOR THREE-PHASE POWER REGULATOR
COMMUNICATION INTERFACE
(RS-485)
Instruction Manual
Notice
Ensure that this instruction manual is handed to the final user of the instrument.
Introduction
This instruction manual describes the basic function and operating procedure of the PAC46 series communication
interface (RS-485).
For the product overview, details on built-in functions, and wiring, installation, operation, and daily maintenance of the
PAC46 series (hereinafter referred to as “the instrument”), please refer to the separate PAC46 SERIES THYRISTOR
THREE-PHASE POWER REGULATOR INSTRUCTION MANUAL (hereinafter referred to as “the regulator instruction
manual”).
MPA046-E02-A
Dec. 2018

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Table of Contents
Notice......................................................................................................................................................... 1
Introduction .............................................................................................................................................. 1
1. Important safety instructions.............................................................................................................. 3
2. Overview ............................................................................................................................................... 4
2-1. Communication interface ............................................................................................................................................................4
2-2. Communication protocol and specifications ...............................................................................................................................4
3. Connection between PAC46 and PC/PLC .......................................................................................... 5
3-1. RS-485........................................................................................................................................................................................5
3-2. Three-state output control...........................................................................................................................................................5
4. Communication settings ..................................................................................................................... 6
4-1. Communication address .............................................................................................................................................................6
4-2. Communication speed ................................................................................................................................................................6
4-3. Communication parity .................................................................................................................................................................6
4-4. Delay time...................................................................................................................................................................................6
4-5. Configuration tool........................................................................................................................................................................6
(1) Installation ..............................................................................................................................................................................6
(2) Removal .................................................................................................................................................................................6
(3) Operation................................................................................................................................................................................7
5. Overview of MODBUS protocol........................................................................................................... 12
5-1. Overview of transmission mode..................................................................................................................................................12
5-2. Message format ..........................................................................................................................................................................12
5-3. Slave address .............................................................................................................................................................................12
5-4. Function code .............................................................................................................................................................................12
5-5. Data ............................................................................................................................................................................................13
5-6. Error check .................................................................................................................................................................................13
5-7. Message example.......................................................................................................................................................................13
6. Communication data address ............................................................................................................. 14
6-1. Details of communication data address......................................................................................................................................14
(1) Data address and read/write command..................................................................................................................................14
(2) Data address and number of data bytes ................................................................................................................................14
(3) Note on data ...........................................................................................................................................................................14
6-2. Communication data address list................................................................................................................................................15
Blank page for writing notes ................................................................................................................... 19

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1. Important safety instructions
The following symbols appear with instructions for safety and for equipment/facility damage prevention, as well as for
additional explanations and notes on exceptions.
WARNING: ◎Failure to comply may result in personal injury or death.
CAUTION: ◎Failure to comply may result in damage to equipment and/or facilities.
NOTE: ◎Additional explanations, notes on exceptions, and other necessary information.
WARNING
The instrument is a control device designed for industrial use.
Never use it for control systems that may have a serious impact on human life.
Furthermore, taking adequate safety measures before use is at the
responsibility of the user.
Please understand that we assume no responsibility for any accident that may
occur as a result of use without safety measures.
●When installing the instrument to the control panel or the like, be careful not
to allow your body to touch the terminals.
●Do not touch the circuit board or put your hand and/or conductive materials
inside the instrument housing by opening it. Never repair or modify the
instrument yourself. There is a risk of electric shock, which may cause fatal
or serious injury.
CAUTION
Where the failure of this instrument may cause damage to nearby devices,
equipment, products, etc., take safety measures, such as installing a fuse or an
anti-overheating device, before use. We shall not be held responsible or liable
for any accident that may occur due to the failure of the user to take safety
measures.
If the instrument has the communication function, and data is written from the
master equipment, trimmer adjusters and control input terminals may be
disabled, making output adjustment by the trimmer adjusters or by input signals
from the control input terminals impossible. To be prepared in case the
communication settings are incorrect, provide safety measures, such as a
circuit breaker, on the power supply input side before using the instrument.
Data written by the master equipment is retained even after power is cut off.
Write data carefully to prevent incorrect communication settings.
To enable input to trimmer adjusters and control input terminals, you need to
write and then set the data again from the master equipment.
Read also the safety precautions provided in the separate regulator instruction
manual carefully and thoroughly understand them before using the instrument.

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2. Overview
2-1. Communication interface
The instrument optionally supports RS-485 communication.
Using a personal computer (hereinafter referred to as "the PC"), PLC, or other equipment as the master and the
instrument as a slave, you can perform master-slave communication to set various parameters and read data.
RS-485 is a data communication standard defined by the Electronic Industries Alliance (EIA) in the United States. The
standard provides hardware specifications, but does not define the software aspects of data transmission procedures.
Therefore, it does not allow for unconditional communication even between equipment with the same interface.
For this reason, the user should fully understand the data transfer specifications and data transmission procedures in
advance.
By using the RS-485 communication function, you can connect multiple units of the instrument in parallel.
If using a PC/PLC or other equipment as the communication master, you can use a commercial RS-485 converter to
perform RS-485 communication. When using a converter, please note the following:
Note 1: Turn off the echo back function if the converter has a switch for this function.
Note 2: Use a converter model that does not require the setting of communication speed and communication parity
parameters by DIP switches or the like.
If your converter requires the setting of DIP switches or the like, the search function of the configuration tool
may not function normally.
Note 3: Converter that has been tested for compatibility
HUMANDATA: USB-003; LINEEYE: SI-35USB
2-2. Communication protocol and specifications
The instrument supports the MODBUS protocol (RTU mode).
Signal level EIA RS-485-compliant
Communication system RS-485 (Two-wire, half-duplex, multi-drop system)
Synchronization system Half-duplex, start-stop synchronous system
Communication distance 500 m max. in total length of RS-485 cables
(depending on connection conditions)
Communication speed 9600 bps / 19200 bps
Transmission procedure No procedure
Communication delay time 10ms / 20ms / 40ms / 80ms / 120ms / 200ms
Number of communication
nodes
Up to 31 nodes supported
(depending on connection conditions)
Communication address 1 to 99
Data format Data length: 8 bits
Parity: NON, EVEN , or ODD selectable
Stop bit: 1 bit (fixed)
Communication encoding Binary data
Control code None
Error check CRC-16

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3. Connection between PAC46 and PC/PLC
Establish a two-line connection between the PC/PLC and the RS-485-A (+) and RS-485-B (-) terminals of the
instrument.
A connection example is shown below.
3-1. RS-485
The input/output logic levels of the terminals are basically as shown below.
MARK Negative (-) terminal < positive (+) terminal
SPACE Negative (-) terminal > positive (+) terminal
However, the positive (+) and negative (-) terminals of the instrument have high impedance until just before the
instrument starts transmission, and therefore the above levels are output just before the start of transmission.
Note 4: If multiple units of the instrument are connected, you need to set a unique communication address for each
unit.
3-2. Three-state output control
Since RS-485 is a multi-drop system, in order to prevent collision of transmission signals, transmission output
normally has high impedance when the instrument is not communicating or when it is receiving data. It is controlled to
switch from high impedance to normal output state just before the start of transmission, and come back to high
impedance again simultaneously at the end of transmission.
However, under three-state control, a delay of about 1 ms occurs after the stop bit of the last data is transmitted.
Therefore, in order to start transmission immediately after data is received by the host, provide a delay time of about a
few milliseconds (ms).
PC/PLC etc.
PAC46 series terminal numbers
Note: According to the RS-485 specification, use the
terminator (1/2 W, 120 Ω) provided between the
terminals, as needed.
However, the terminator should be installed in only
one PAC46 unit that serves the terminal node.
If the terminator is installed in two or more units,
operation cannot be guaranteed.
Terminator (120 Ω)
High
impedance
Transmission si
g
nal
High
impedance
Stop bit Start bit Sto
p
bit

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4. Communication settings
The instrument uses four different communication parameters as described below.
You can change these parameters with a dedicated configuration tool.
4-1. Communication address
Initial value: 1
Setting range: 1 to 99
4-2. Communication speed
Initial value: 19200 bps
Setting range: 9600 / 19200 bps
4-3. Communication parity
Initial value: NON
Setting range: NON / EVEN / ODD
4-4. Delay time
Set the delay time before the start of transmission after a command is received.
Initial value: 20 ms
Setting range: 10 / 20 / 40 / 80 / 120 / 200 ms
4-5. Configuration tool
The configuration tool, PAC46 Configurator, is available for download from our website.
After connecting the instrument to the PC, use this configuration tool to set the communication address,
communication speed, communication parity, and delay time.
(To connect the instrument to the PC, a commercial RS-485 converter is required.)
(1) Installation
(i) Download PAC46_config_v***.zip from our website into an appropriate folder on the PC in use and
decompress the compressed file.
Note 5: The portion v*** of the file name represents the version number.
(ii) Double-click Setup.exe in the extracted folder to start installation.
By default, in the Program Files(x86) folder on drive C, a folder named Shimaden is created and the
PAC46_config_v*** is found in it. The executable file is installed in the PAC46_config_v*** folder. However,
you can specify the installation folder as desired.
The tool may not function normally depending on the operating environment (such as the system) and
utilization.
Please note in advance that we cannot guarantee the tool’s operation on PCs that are not purchased from a
manufacturer (such as custom-made PCs).
■Recommended operating environment
Supported OS: Windows 10 and Windows 7
Available hard disk space: 1 MB or more
Memory capacity: Recommended for Windows
Note 6: Windows 10 and Windows 7 are either trademarks or registered trademarks of Microsoft Corporation
in the United States and/or other countries.
(2) Removal
The configuration tool PAC46 Configurator can be removed through one of the following two methods:
(i) Double-click Setup.exe, which is the executable file that was used when installing the tool. To remove the
tool, select Remove.
(ii) From Control Panel, execute Add or Remove Programs to remove PAC46_config_v***.

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Select the port
range to search.
Click this to start a
search.
(3) Operation
Connect the PC, RS-485 converter, and PAC46 in advance.
Be sure to connect only one PAC46 unit. It is not possible to set multiple units at the same time.
Start the configuration tool. The screen as shown in Fig-1 appears.
Check that the PAC46 is powered on. Then, specify the port range to search and click Start Search.
(Fig-1)
Before selecting the port range to search, click Control Panel -> Hardware and Sound -> Device Manager -> Ports
(COM & LPT) on the PC and check the port number assigned to the RS-485 converter. (Windows 7)
When the PAC46 is detected by the PC, the screen is as shown in Fig-2.
(Fig-2)
When the PAC46 cannot be detected by the PC, the screen is as shown in Fig-3.
In this case, check the PC, RS-485 converter, and PAC46 for connection and errors.
(Fig-3)

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Click OK on the screen shown in Fig-2. You are now ready to edit communication parameters and control parameters.
(Fig-4)
Click Edit Communication Parameters on the screen shown in Fig-4 to go to the screen shown in Fig-5.
(Fig-5)
Edit the communication address, communication speed, communication delay, and communication parity, as needed.
If multiple units of PAC46 are connected on the same communication line, assign a unique communication address to
each of them.
After editing the settings, click Write to PAC46. If the data is successfully written, the screen is as shown in Fig-6.
To restore the default settings, click Restore Defaults and then click Write to PAC46.
Note that clicking only Restore Defaults does not restore the default PAC46 communication parameters.
(Fig-6)
Click this to edit
communication parameters.
Click this to edit control
parameters.
Click this to write the content
of edits to the PAC46.

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Click Edit Control Parameters on the screen shown in Fig-4 to go to the screen shown in Fig-7.
(Fig-7)
Edit the control parameters, as needed.
After editing the settings, click Write to PAC46. Now, the screen is as shown in Fig-8.
To restore the default settings, click Set Default and then click Write to PAC46.
Note that clicking only Set Default does not restore the default PAC46 control parameters.
(Fig-8)
CAUTION
Data written by the master equipment is retained even after power is cut off. Write data carefully to prevent incorrect
communication settings. To enable input to trimmer adjusters and control input terminals (by setting -1), you need to
write and then set the data again from the master equipment.
Click this to write the content
of edits to the PAC46.

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If the control mode has been changed, the PAC46 is reset and output stops temporarily.
(Fig-9)
If the control parameter data is successfully written, the screen is as shown in Fig-10.
(Fig-10)

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To record the data set on the Edit Control Parameters screen to a csv file, click Save Setting on the screen shown in
Fig-11.
Note 7: If you do not click Write to PAC46 after editing the control parameters, the settings that were written from the
PAC46 will be recorded.
(Fig-11)
The csv file is stored in the Documents folder of the user who has logged in to the PC.
The created csv file name has a time stamp that indicates the date and time at which its recording was started.
Example: conf_160606175312.csv indicates that the recording of file was started at 17:53:12 on June 6, 2016.
If you have a spreadsheet application or the like installed on the PC, you can check the recorded data by
double-clicking the csv file.
Alternatively, you may open the csv file in Notepad to check the data.
Click this to record
the settings.

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5. Overview of MODBUS protocol
The instrument supports the MODBUS protocol (RTU mode).
5-1. Overview of transmission mode
In this mode, 8-bit binary data in commands will be transmitted as is.
■Data format
Error check CRC-16 (Cyclic Redundancy Check) method
Data communication interval 3.5 character transmission time or less
5-2. Message format
A message is formatted so that it begins and ends with an idle time of 3.5 characters transmission time or more.
Idle
3.5
characters
Slave
address
Function
code Data Error check CRC-16
Idle
3.5
characters
5-3. Slave address
Slave address refers to the communication address of the instrument, which can be set in the range of 1 to 99.
The master specifies this communication address in a request message to identify each slave.
Each slave sets its slave address in a response message and returns it to let the master know which slave is
responding.
5-4. Function code
A function code specifies the type of operation that a slave should perform.
Function code Details
03 (03H) Instructs slave to read set values and information
06 (06H) Instructs slave to write data
Function codes are also used when a slave returns a response message to the master to indicate whether it is a
normal response (acknowledgment) or a response to indicate the occurrence of an error (negative acknowledgment).
An acknowledgment is returned with the original function code set in it.
A negative acknowledgment is returned with the most significant bit of the original function code set to 1.
For example, if the master transmits a request message with an incorrect function code 10H to a slave, since it is a
non-existent function code, the slave sets the most significant bit to 1 and returns it as 90H.
Moreover, in the case of a negative acknowledgment, the slave sets an error code in the response message to let the
master know what type of error has occurred.
Error code Details
1 (01H) Non-existent function
2 (02H) Non-existent data address
3 (03H) Value out of setting range

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5-5. Data
The format of data varies depending on the function code.
A request message from the master consists of a data item, the number of data bytes, and set data.
A response message from a slave consists of the number of bytes and data to be returned in response, and an error
code or the like if it is a negative acknowledgment.
The valid range of data is -32768 to +32767.
5-6. Error check
In the RTU mode, an error check is performed by calculating the CRC-16 data from the slave address to the end of
data and setting the calculated 16-bit data after the data, in order from the low-order bit to the high-order bit.
■Calculation of CRC-16 data
The CRC method divides the information to be sent by a generating polynomial and appends the remainder to the end
of that information.
Generating polynomial: X16 + X15 + X2+ 1
1. Initialize the CRC data (which is assumed to be X). (FFFFH)
2. Take the exclusive OR (XOR) of the first data and X, and substitute it for X.
3. Shift X one bit to the right, and substitute it for X.
4. If there is a carry as a result of the shift, take the XOR of the result X in 3. and the fixed value (A001H), and
substitute it for X.
If there is no carry, go to 5.
5. Repeat 3. and 4. to shift X eight times.
6. Take the XOR of the next data and X, and substitute it for X.
7. Repeat 3. to 5.
8. Repeat 3. to 5. up to the last data.
Set X as the CRC-16 data in the message after the data, in order from the low-order bit to the high-order bit.
5-7. Message example
■Reading average voltage from slave address 1
•Request message from master
Idle
3.5
characters
Slave
address
Function
code
Data
address
Number of
data
Error
check
CRC
Idle
3.5
characters
(01H) (03H) (0100H) (0001H) (85F6H)
1 1 2 2 2 ←Number of characters (8)
•Normal response message from slave (07D0H (hexadecimal) →2000 (decimal) →Read value: 200.0 V)
Idle
3.5
characters
Slave
address
Function
code
Response
Number of
bytes
Data
Error
Check
CRC
Idle
3.5
characters
(01H) (03H) (02H) (07D0H) (xxxxH)
1 1 1 2 2 ←Number of characters (7)
•Error response message from slave (for incorrect data address)
Idle
3.5
characters
Slave
address
Function
code Error code
Error
check
CRC
Idle
3.5
characters
(01H) (83H) (02H) (xxxxH)
1 1 1 2 →Number of characters (5)
In a response message in case of an error, 1 is set as the most significant bit of the function code (83H).
An error response message, the error code 02H (Non-existent data address), is returned.

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6. Communication data address
6-1. Details of communication data address
(1) Data address and read/write command
•The data address range is 0100H to 011B and 0300H to 0314H.
•RW stands for data that can be read and written.
•R stands for read-only data.
•W stands for write-only data.
•If the read command (R) is used to specify a write-only data address, or if the write command (W) is used to specify
a read-only address, a data address error occurs and the error response code (02H) Data address/number of data
bytes error is returned.
(2) Data address and number of data bytes
•If a data address that is not included in the PAC46 communication data address list is specified as the first data
address, a data address error occurs and the error code (02H) Data address/number of data bytes error is returned.
•The number of data bytes that can be read is 10 or less. It is not possible to read more than 10 data bytes at the
same time.
• The number of data bytes that can be written is 1. It is not possible to write multiple data bytes at the same time.
(3) Note on data
•Because each data byte represents a16-bit value without a decimal point, the data type, the presence/absence of
decimal points, and the like must be checked.
Example: Average voltage (Data address: 0100H)
Hexadecimal data
200 V →200.0 V →07D0H

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6-2. Communication data address list
6-2-1. Accessing data addresses 0100 to 0108 to enable reading of present output voltage, output
current, heater resistance, etc.
Data Address Read / Write Data name Details
0100 R Output voltage
Average of phase-to-phase output voltage values
Unit: 0.1 V (Example: 1732 →173.2V)
0101 R Output current*1 Average of phase-to-phase output current values
Unit: 0.1 A
0102 R Output power*1
Three-phase output power
(√3 x Output voltage x Output current)
Unit: 10 VA when current capacity is 20 A to 300 A
Unit: 100 VA when current capacity is 500 A or 600 A
0103 R Heater resistance*1
Approximate heater resistance when output current is
20% or above of rated current and three heaters with
same rating are connected by delta connection. Unit:
0.01 Ω
However, 0 is always returned if output current is below
10% of rated current.
0104 R
Power supply
abnormal
0x00: Normal
0x01: Open phase or phase sequence abnormal
0x02: Frequency abnormal (out of 45 to 65 Hz range)
Logical disjunction of above values if there are two or
more causes.
Open phase may be evaluated as open phase and
frequency abnormal.
0105 R Over-current
0: Normal
1: Over-current
0106 R Fuse blown
0: Normal
1: Fuse blown
0107 R Heater break
0: Normal
1: Heater break
0108 R
Temperature
abnormal
0: Normal
1: Temperature abnormal
*1 Accuracy is degraded if the output current is lower than the rated current.

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6-2-2. Accessing data addresses 0109 to 0115 to enable reading of control terminal input status,
trimmer adjuster setting, etc.
Data Address Read / Write Data name Details
0109 R Control terminal, DI1 input 0: Input open
1: Input short-circuited
010A R Control terminal, DI2 input
010B
R Control terminal, Control signal input Unit: 0.1%
Example: 0 at 0% input or below
Example: About 500 at 50% input
Example: 1000 at 100% input or
above
010C R
Control terminal, Automatic power
control input
010D R Control terminal, VR1 input
Unit: 0.1%
Example: 0 at minimum
Example: About 500 at middle
Example: 1000 at maximum
010E R Control terminal, VR2 input
010F R Control terminal, VR3 input
0110 R
Control terminal, trimmer input
(POWER: Internal power)
0111 R
Control terminal, trimmer input
(SOFT START: Softstart)
0112 R
Control terminal, trimmer input
(H/B SET: Heater break alarm setting)
0113 R
Control terminal, trimmer input
(AUTO POWER: Automatic power)
0114 R
Control terminal, trimmer input
(STARTUP LEV.: Start-up time output
limit level
0115 R
Control terminal, trimmer input
(STARTUP TIM.: Start-up time output
limit time)
6-2-3. Accessing data address 0116 to 011B to enable reading of phase-to-phase voltage and
phase-to-phase output current
Data Address Read / Write Data name Details
0116 R U-V phase-to-phase voltage
Unit: 0.1 V
Example: 2000 →200.0 V
0117 R V-W phase-to-phase voltage
0118 R W-U phase-to-phase voltage
0119 R U phase current*1 Unit: 0.1 A
Example: 100 →10.0 A
011 A R V phase current*1
011 B R W phase current*1
*1 Accuracy is degraded if the output current is lower than the rated current.

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6-2-4. Accessing data addresses 0300 to 030C to enable changing of input to trimmer adjusters
and control terminals provided on front panel via communication from master equipment
Data Address Read / Write Data name Setting range Details
0300 RW
Internal power adjustment
communication setting
-1/0 to 1000
-1: Trimmer enabled (default)
0 to 1000: Communication setting
enabled
Example: 0 at minimum
Example: 500 at middle
Example: 1000 at maximum
0301 RW
Soft start time adjustment
communication setting
0302 RW
Heater break alarm
communication setting
0303 RW Automatic power
communication setting
0304 RW
Start-up time output limit
level
communication setting
0305 RW
Start-up time output limit
time
communication setting
0306 RW
Control signal input
communication setting
-1/0 to 1000
-1: Control terminals enabled
(default)
0 to 1000: Communication setting
enabled
Example: 0% input at 0
Example: 50% input at 500
Example: 100% input at 1000
0307 RW VR1 input
communication setting
0308 RW VR2 input
communication setting
0309 RW DI1 input
communication setting
-1/0/1
-1: Control terminals enabled
(default)
0/1: Communication setting enabled
Example: Open at 0
Example: Short-circuited at 1
030A RW DI2 input
communication setting
030B RW VR3 input
communication setting
-1/0 to 1000
-1: Control terminals enabled
(default)
0 to 1000: Communication setting
enabled
Example: 0% input at 0
Example: 50% input at 500
Example: 100% input at 1000
030C RW
Automatic power input
communication setting
6-2-5. Accessing data addresses 030D or 030E to enable operation of alarm output independent of
regulator control
Data Address Read / Write Data name Setting range Details
030D RW Alarm output
communication setting
-1/0/1
-1: Alarm output by regulator enabled
(default)
0/1: Communication setting enabled
Example: Forced to off at 0
Example: Forced to on at 1
030E RW
Alarm break alarm output
communication setting

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6-2-6. Accessing data address 030F to enable change of control mode
Data Address Read / Write Data name Setting range Details
030F RW
Control mode
communication
setting*2
0/1/2/3/4
0: Voltage feedback
1: Current feedback
2: Power feedback
3: Voltage square feedback
4: No feedback*3
(Factory-set default is initial value.)
0310 RW
Stop output
communication
setting
0/1
0: Continue output (default)
1: Force-stop output
0311 RW
Communication
memory mode 0/1
0: Save all settings to EEPROM
(default)
1: Save all but control signal input
(0306)
(It is recommended that this be set
to 1 if control signal input is
frequently rewritten.)
0312 RW
Heater break
output delay time
0 to 1000
(Unit: seconds)
Turn on alarm output when set time
has elapsed after heater break
detection.
(Default: 0 seconds)
0313 RW
Heater break
output mode 0/1
0: Turn alarm output from on back to
off when heater alarm is resolved
after heater break detection.
(Default)
1: Continue alarm output until power
is turned off after heater alarm
detection.
0314 RW
Control input scale
lower limit 0 to 200
Example: When set to 30, the PAC46
starts output when control
signal input has risen to
3.1%.
(Default: 30)
0315 W Reset parameters
Enabled only when
1 is written.
0 is always returned
when data is read.
Reset all of settings 0300 to 030E and
0310 to 0314 to default values when 1
is written. Control mode is not
changed, however.
*2 If the control mode is changed, the PAC46 is reset and output stops temporarily.
*3 Caution! The feedback control function is disabled if 4 is written to the data address 030F.

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Blank page for writing notes

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