INVT Goodrive350 Series User manual

Goodrive350 series VFD Auto Station programmable expansion card Safety precautions
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Safety precautions
The expansion card must be installed and operated only by professionals who have taken part
in professional training on electrical operation and safety knowledge, obtained the certification,
and been familiar with all steps and requirements for the installing, commissioning, operating,
and maintaining, and are capable of preventing all kinds of emergencies.
Before installing, removing, or operating the expansion card, read the safety precautions
described in this manual and the variable-frequency drive (VFD) operation manual carefully to
ensure safe operation.
We are not responsible or liable for any physical injuries or device damage caused due to your
neglect of the safety precautions described in this manual and the VFD operation manual.
You need to open the VFD housing to install or remove the expansion card. Therefore,
you must disconnect all power supplies of the VFD and ensure that the voltage inside
the VFD is safe. For details, see the description in the VFD operation manual. Severe
physical injuries or even death may be caused if you do not follow the instructions.
Store the expansion card in a place that is dustproof and damp-proof without electric
shocks or mechanical pressure.
The expansion card is electrostatic sensitive. Take measurements to prevent
electrostatic discharge when performing operations involving it.
Tighten the screws up when installing the expansion card. Ensure that it is firmly fixed
and properly grounded.

Goodrive350 series VFD Auto Station programmable expansion card Contents
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Contents
Safety precautions ...................................................................................................................i
Contents...................................................................................................................................ii
1 Product confirmation ...........................................................................................................1
2 Product overview..................................................................................................................2
2.1 Expansion card introduction..........................................................................................2
2.2 Models...........................................................................................................................2
2.3 Terminal layout...............................................................................................................3
2.4 Status indicators............................................................................................................5
3 Secondary development platform ......................................................................................6
3.1 Auto Station introduction................................................................................................6
3.2 PLC program download interface..................................................................................6
3.3 How to edit programs on theAuto Station.....................................................................7
4 Auto Station programming interfaces..............................................................................11
4.1 Importing and exporting interfaces..............................................................................11
4.2 Interfaces for digital inputs and outputs.......................................................................13
4.3 Interfaces for analog inputs and outputs .....................................................................16
4.4 Interfaces for control commands and function commands..........................................18
4.5 Interfaces for setting function parameters...................................................................20
4.6 Interfaces for viewing function parameters and VFD status........................................22
4.7 PLC-defined fault interface..........................................................................................25
4.8 Interfaces for writing data............................................................................................26
4.9 Interfaces for monitoring PLC card data......................................................................27
4.10 RUN/STOP switch and PLC card running status ......................................................28
4.11 DP/CANopen/PN communication channel ................................................................29
4.12 RS485 communication and power-outage saving.....................................................33
5 Programming cases ...........................................................................................................35
5.1 For PLC card digital input/output terminals .................................................................35
5.2 For terminal-based running/fault control......................................................................35
5.3 For multi-step setting and running...............................................................................36
5.4 For RS485 communication..........................................................................................38
Appendix 1 D elements for exchange between the PLC card and VFD ...........................41
Appendix 2 Function codes for the PLC card (Group P27)...............................................52

Goodrive350 series VFD Auto Station programmable expansion card Product confirmation
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1 Product confirmation
Check the following after receiving Goodrive350 series VFD Auto Station programmable
expansion card:
Whether the expansion card is damaged.
Whether the received expansion card is the one you purchase according to the bar
code label on the PCB.
Whether all the following items are contained in the product package:
One expansion card, one tie buckle, one tie, one M3 screw, and one manual
If the expansion card is damaged, a wrong model is delivered, or some items are missing,
contact the supplier in a timely manner.
Confirm the environmental requirements for application.
Table 1.1 Environmental requirements
Item
Requirement
Working temperature
-10–50°C
Storage temperature
-20–60°C
Relative humidity
5%–95%
Other weather conditions
No condensation, ice, rain, snow, or hail;
Solar radiation < 700 W/m2
Air pressure
70–106kPa
Vibration and impact
5.8m/s2(0.6g) at the sine vibration of 9 Hz to 200 Hz

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2 Product overview
2.1 Expansion card introduction
GD350 series VFD Auto Station programmable expansion card (hereinafter called PLC card)
works with the VFD to replace small-size PLC in certain application cases. We develop the
Auto Station to perform secondary program development on the PLC card, supporting three
programmable languages, including the instruction language (IL), ladder diagram (LD), and
sequential function chart (SFC). The PLC card has 16K step user program storage space and
8K words data storage space (D elements) for easy development. After completing programs
on the Auto Station, you can upload the programs through the mini-USB interface to the PLC
card for running. The PLC card transfers data to the VFD so as to control VFD running and
modify parameters. In addition, the PLC card provides the power-outage saving function,
which will save the values about 1K words of the M/S/D/C elements in case of power outage if
you have specified the saving range on the Auto Station. You can use the RS485 channel for
network communication. The standard Modbus protocol has been embedded into the PLC
card so that the master/slave switchover can be performed on the Auto Station. The PLC card
also provides the DP/CANopen/PN card with the PZD channel, through which data can be
transferred from the DP/CANopen/PN card to the PLC card for secondary programming or
from GD350 to the PLC card and then transferred to the DP/CANopen/PN card.
When the PLC card works with the VFD, all the external I/O terminals of the VFD can be
invoked by the PLC card, enriching the I/O points of the PLC card.
2.2 Models
The following is a GD350 expansion card model example:
EC–PC 5 02–00
①②③④⑤
Figure 2.1 Expansion card model example
Table 2.1 Expansion card model description
No.
Field
Description
①
Product category
EC: Expansion card
②
Expansion card type
IC: IoT card
IO: IO card
PC: Programmable card
PG: PG card
PS: Power supply card
TX: Communication card

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No.
Field
Description
③
Technical version
Indicates the generation of technical version by using an
odd number. For example, 1, 3, 5, and 7 indicate the 1st,
2nd, 3rd and 4th generations of technical version.
④
Identifying code
01: 10 points , with 6 inputs and 4 outputs (2 transistor
outputs + 2 relay outputs)
02: 8 points of I/O, 1 point of AI, 1 point of AO, and 1 point
of RS485 communication
03: Reserved
⑤
Special requirement
Reserved. The default value is 00.
2.3 Terminal layout
The terminal layout of the PLC card is as follows:
COM
COM
PS1
PS2
PS3
PRO2A
PRO2C
PW
24V
PS4
PS5
PS6
PRO1A
PRO1C
Figure 2.2 Terminal layout of the PLC card
The following table describes the functions of the terminals.
Table 2.2 Terminals of the PLC card
Category
Symbol
Name
Function
Power supply
PW
External power
supply
To provide input digital working power from
external to internal.
Voltage range: 12–24V
PW and +24V are short connected by
default.
24V
Internal power supply
Internal output power supply, 100mA
Common
terminal/ground
COM
Common terminal of
+24V
Common terminal of +24V. If PS1 is
connected, COM indicates PS1 is
connected.
GND
Analog ground
Reference zero potential of +10V
PE
Protective earthing
terminal
Protective earthing terminal
Digital input
PS1
Digital input 1
1. Internal impedance: 4kΩ
2. Accept 12–30V voltage input
3. Bi-directional input terminal
4. Max. input frequency: 1kHz
PS2
Digital input 2
PS3
Digital input 3
PS4
Digital input 4
PE
485-
485+
GND
AI1
AO1

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Category
Symbol
Name
Function
PS5
Digital input 5
5. Both source and sink inputs are allowed,
but the input types must be the same
PS6
Digital input 6
Analog input
and output
AI1
Analog input 1
1. Input range: AI1 voltage and current
range: 0–10V, 0–20mA
2. Input impedance: 20kΩ during voltage
input; 250Ω during current input
3. Voltage or current input is set through
the jumper.
4. Resolution ratio: When 10V corresponds
to 50Hz, the min. resolution ratio is 5mV
5. Deviation: ±1% when the input reaches
full the measurement range at 25°C
AO1
Analog output 1
1. Output range: 0–10V voltage or 0–20mA
current
2. Voltage or current output is set through
the jumper.
3. Deviation: ±1% when the input reaches
full the measurement range at 25°C.
Relay output
PRO1A
NO contact of relay 1
1. Contact capacity: 2A/AC250V,
1A/DC30V
2. Unable to function as high frequency
switch output
PRO1C
Common contact of
relay 1
PRO2A
NO contact of relay 2
PRO2C
Common contact of
relay 2
Communication
485+
RS485
communication
terminal
RS485 communication port, which can be
set as the master or slave through the Auto
Station. It is differential signal output.
Whether to connect the 120Ω resistor of
RS485 is set through the jumper.
485-
Note:
The jumpers used for connection are at the side of the PE, 485-, 485+, GND, AI1, and
AO1 terminal block.
AI and AV are the current and voltage selection options of analog input AI1 and the
connection to jumper J2 determines the input type.
AIO and AVO are the current and voltage selection options of analog output AO1 and the
connection to jumper J5 determines the output type.
The symbol "120" indicates the 120Ω resistor, which can be connected to jumper J1. By
default, J1 connects to NC, J2 connects to AV, and J5 connects to AVO.

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Figure 2.3 PLC card
2.4 Status indicators
The dial switch SW1 on the PLC card can control the running and stop of programs on the
card. The PLC card provides five status indicators to represent the status.
Table 2.3 Status indicators
Indicator
No.
Represents
Function
LED1
PWR power supply
indicator (green)
It is steady on when the PLC card is powered
on.
LED3
COMM
communication
indicator (green)
It is steady on when the PLC card is
establishing connection to the control board.
When the PLC card properly connects to the
control board, it turns on for 0.5 second and
turns off for 0.5 second in a regular way.
When the PLC card is disconnected from the
control board, it is steady off.
LED4
ERR fault indicator
(red)
When a fault occurs, it turns on for 0.5 second
and turns off for 0.5 second in a regular way.
When there is no fault, it is steady off.
The fault can be queried through the Auto
Station.
LED5
PWR power supply
indicator (green)
It is steady on when the PLC card is powered
on.
LED6
RUN running status
indicator (green)
It is steady on when the PLC program runs.
It is steady off when the PLC program stops.

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3 Secondary development platform
3.1 Auto Station introduction
We have developed the Auto Station as the secondary development platform of PLC cards.
You can download the latest Auto Station from https://www.invt.com/.
If you have successfully installed the Auto Station, double-click the Auto Station. The interface
is displayed, as shown in the following:
Figure 3.1 Auto Station interface
3.2 PLC program download interface
If you want to download programs to the PLC card through the Auto Station, you need to
install the driver, use the mini-USB cable to connect the PLC card to the PC. If the driver cannot
be installed automatically, visit http://www.wch-ic.com/downloads/CH341SER_EXE.html and
download the CH341SER.EXE file for USB-serial port driver of PLC card. If you cannot install
it, contact us to obtain the driver and drive installation guide.
After installing the driver, open the Auto Station. After creating a project, choose PLC
Communication > Connect, and choose Program Port Setting. Set related parameters.

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Generally, you only need to select the serial port (for example, COM5).
Figure 3.2 Serial port setting for program download
3.3 How to edit programs on the Auto Station
1. After opening the Auto Station, choose File > New Project to create a project. Select IVC1L
as the PLC type since the PLC card uses the structure of the IVC1L programmable controller
developed by us. See the following figure.
Figure 3.3 Creating a project
You can also choose Tool > Options… to change the default editor (program editing
language), PLC type, and interface language. The new project is an IVC1L project by default.
See the following figure.

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Figure 3.4 Default option settings
The interface that is displayed after the project creation is as follows:
Figure 3.5 New project interface
The interface can be divided into five areas:
Area ①: Menu and toolbar area. If you move the mouse over the toolbar area, the function of
the corresponding tool is displayed. You can choose View > Instruction List/Ladder/SFC to
change the program language. If a fault occurs, LED4 is blinking. You can choose PLC > PLC

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Info… to view fault information and choose PLC > Clear PLC Error Information to clear fault
information. After the clearing, LED4 turns off. You can also choose Debug > Monitor to
monitor variables. In monitoring mode, you can directly modify readable and writable elements
to test programs. In addition, you can choose Help > Help Topic to view instruction
descriptions and typical instances.
Area ②: Project manager. If you want to use the RS485 function, you need to configure
System Block > Serial Port. If you want to use the power-outage saving function, you need
to configure System Block > Saving Range. If you want to monitor variables in monitoring
mode, you need to configure Element monitoring table > EMT_1 or right-click the monitoring
table to add element monitoring tables such as EMT_2 and EMT_3. If you want to download
programs from the Auto Station to the PLC card or monitoring the running status, you need to
configure PLC Communication > Connect, select a serial port, and set related port
parameters.
Area ③: Instruction tree. The instruction tree enables you to select instructions to edit
secondary development programs.
Area ④: Program editing area. You can edit programs in this area after selecting a program
language.
Area ⑤: Information output area, in which information such as download, upload, and
monitoring information is output, for easy debugging and view.
2. After completing a PLC program, you can download the program to the PLC card by clicking
the download button on the toolbar. In case of power outage, the program is downloaded to
the flash memory. When the SW1 switch is turned to RUN, you can control the running and
stop of PLC programs by clicking the Run/Stop button on the toolbar of the Auto Station.
3. When the PLC card runs a user-defined program, you can connect to the Auto Station
through the mini-USB, and choose Debug > Monitor to monitor PLC card variables.
Double-click to choose Element monitoring table > EMT_1. In the window that is displayed,
enter to-be-monitored variables in the Element Name column. If the variables are readable
and writable, you can enter values in the new value column, right-click to choose Write
Selected Element to change the element status. See the following figure.
Figure 3.6 Monitoring mode
4. You can keep edited programs secret since the Auto Station also provides multi-level
security measures, which are described in the following.

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Table 3.1 Security measures for user-defined programs
Security measure
Description
Disabling formatting
After formatting is disabled in the system block and the system block
is downloaded to the PLC, the user-defined programs, system block,
and data block in the PLC cannot be deleted by means of formatting.
To enable formatting, download the new system block and enable
formatting on the new system block.
Download password
Used to restrict download.
Disabling upload
If you select the option of disabling upload in the download dialog
box as you perform download, you cannot perform upload regardless
of whether you have the upload password.
To enable upload, re-download user data, and select the option of
enabling upload in the download dialog box.
Upload password
Used to restrict the upload function.
Monitoring password
Used to restrict the monitoring function.
Program password
You can set password to encrypt the main programs, sub programs,
and terminated sub programs. After being encrypted, the program
content cannot be viewed or edited. You can view and edit such
encrypted programs only after entering the correct passwords.
Encryption method: Right-click a program, choose Encrypt/Decrypt,
enter a password, and confirm the password. The program is
encrypted.
Decryption method: Right-click an encrypted program, choose
Encrypt/Decrypt, and enter the correct password. The program is
decrypted.
5. To understand the instructions and soft elements for secondary development on the Auto
Station, see INVT IVC Series Micro-PLC Programming Manual. The PLC card corresponds to
IVC1L.

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4 Auto Station programming interfaces
The PLC card integrates the secondary development function by using the Auto Station. In
addition to the functions equipped with the PLC card, the entrance parameters required for
Auto Station programming also include the PLC card hardware functions, VFD hardware
functions, and VFD parameters. The output of Auto Station programming results is not only for
the internal use of the PLC card, but also for other control purposes such as controlling the
hardware output interfaces of the PLC card, the hardware output interfaces of the VFD, and
the start and stop commands of the VFD.
This chapter describes the relationship between the Auto Station secondary development,
PLC card, and VFD interfaces (including hardware and software instructions), with a focus on
Auto Station programming interfaces. The VFD related functions of Auto Station programming
interfaces are valid only when the SW1 is in Run state.
If not otherwise specified, all programming instructions use the LD programming system.
4.1 Importing and exporting interfaces
You can define programming interfaces and export the interface data to an Excel file. The
Auto Station can provide programming interfaces by importing the Excel interface file. We
provide a default programming interface file (an Excel file), which contains the interface names
and corresponding PLC elements (D elements). You can use D elements for programming
regardless of whether you import an Excel file. The default Excel file for GD350 programming
interfaces is GD350_PLCcard_V100.xls.
In the Excel file, each variable is named in the format of I/C_xx, in which I indicates the
variable is sent to the PLC card through the VFD, while C indicates the variable is sent from
the PLC card to the VFD. In a word, the initial letter identifies the variable type.
The PLC card provides data storage elements of 8000 words, D0–D7999, in which
D7400–D7699 are defined as the VFD data transfer interfaces that have special meanings
corresponding to GD350 VFD parameters and therefore cannot be used as common storage
elements and the other D elements can be used as required.
The method of importing programming interfaces is as follows:
1. Double-click Global variable table on the Project Manager bar. In the opened global
variable table, choose File > Import Global Variable. Then select
GD350_PLCCard_V100.xls.

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Figure 4.1 Importing global variables
The imported global variable table is similar to the following:
Figure 4.2 Global variable table
When programming, you can directly use the variable names in the global variable table or
use the corresponding D elements (after D elements are written, the system automatically
replace the D elements with corresponding variable names). The following is an example of
saving the set frequency of the VFD to the element D100:
Figure 4.3 Programming example of using the global variable table
If the global variable table is not imported, which indicates the table is empty, you can only use

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D7400–D7599 for programming. The following is an example of saving the set frequency of
the VFD to the element D100:
Figure 4.4 Programming example of not using the global variable table
2. You can define a global variable table by yourself. That is, fill in the global variable table and
export the global variable table. Then the user-defined global variable table is saved. You can
import this global variable table when creating a project. Note that a variable name in the
global variable table cannot exceed 16 ASCII characters.
Note:
The prerequisite to import and export the global variable table is that the global variable
table window has been opened (to open the window, double-click the global variable table
in the project manager).
A limit is imposed on the number of variables in the global variable table that can be
downloaded to the PLC card. If there are too many variables defined in the global variable
table, the use is not affected, but some or all variables cannot be uploaded (at this time,
only the method described in this section can be used for import).
After importing the global variable table, you need to choose View > Symbol Addressing
so that the D elements are displayed normally. Otherwise, the D elements are displayed
like "Dxxxx".
4.2 Interfaces for digital inputs and outputs
In addition to embedded I/O points, the PLC card can use VFD I/O points the since the card is
inserted into the VFD control board. (The specific I/O point quantity depends on the actual
product development.) You can define and use virtual I/O points, intermediate relays, and soft
elements on the Auto Station based on needs.
The following table lists the interfaces corresponding to the digital inputs and outputs of
GD350 and PLC card.
Table 4.1 Interfaces corresponding to the digital inputs and outputs of the VFD and PLC card
Auto Station
interface
variable name
D/X/Y
element
VFD
function
code
Interface description
I_DiState
D7403
P17.12
I_DiState is an unsigned 16-bit number, which is
read only.
Each bit represents a unique digital input terminal

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Auto Station
interface
variable name
D/X/Y
element
VFD
function
code
Interface description
on the VFD:
Bit0: S1
Bit1: S2
Bit2: S3
Bit3: S4
Bit4: S5 (VFD I/O expansion card input terminal S5)
Bit5: S6 (VFD I/O expansion card input terminal S6)
Bit6: S7 (VFD I/O expansion card input terminal S7)
Bit7: S8 (VFD I/O expansion card input terminal S8)
Bit8: HDIA (for digital input)
Bit9: HDIB (for digital input)
Bit10–Bit15: Reserved
C_SetDo
D7626
/
C_SetDo is an unsigned 16-bit number, which is
readable and writable.
Each bit represents a unique digital output terminal
of the VFD:
Bit0: Y1
Bit1: HDO (for digital output)
Bit2: Y2 (VFD I/O expansion card output terminal
Y2)
Bit3: RO1
Bit4: RO2
Bit5: RO3 (VFD I/O expansion card output terminal
RO3)
Bit6: RO4 (VFD I/O expansion card output terminal
RO4)
Bit7–Bit15: Reserved
X0
X0
/
Digital input terminal PS1 on the PLC card
X1
X1
/
Digital input terminal PS2 on the PLC card
X2
X2
/
Digital input terminal PS3 on the PLC card
X3
X3
/
Digital input terminal PS4 on the PLC card
X4
X4
/
Digital input terminal PS5 on the PLC card
X5
X5
/
Digital input terminal PS6 on the PLC card
Y0
Y0
/
Relay output terminal PRO1 on the PLC card
Y1
Y1
/
Relay output terminal PRO2 on the PLC card

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1. You can apply a bit contact instruction to I_DiState to perform terminal control. (The bit
contact instruction is BLD, which can be found in the instruction tree. For details about how to
use instructions, see the IVC Series Micro-PLC Programming Manual.)
Figure 4.5 Using a bit contact instruction
This statement is used to get bit0 (16#0) of I_DiState, that is, to get the status of VFD input
terminal S1. If the bit is 1, 1 is written to C_CTRL, which is described later, the VFD runs
forward after setting P00.01=2 and P00.02=4 for the VFD.
2. You can use the following instructions to divide I_DiState into 16 bit-elements.
Figure 4.6 Word/bit conversion
This program segment divides I_DiState into 16 bit-elements, which are M0–M15. You can
operate the 16 bit-elements respectively. As shown in the figure, M0 is checked. When M0 is
connected (I_DiState Bit0=1), 1 is written to C_CTRL, the VFD runs forward if correct
channels have been set.
3. After setting correct channel parameters P06.00–P06.04, P26.00–P26.02, and
P26.04–P26.05, you can directly write a value to C_SetDo to control VFD output terminals.
For example, run the following instruction:
Figure 4.7 Controlling VFD output terminals
In the instruction, 2#1 represents 0000001 in binary format, writing it to C_SetDo, which
means Bit0=1, indicates connecting the VFD output terminal Y1.
4. For I/O terminals on the PLC card, directly edit programs on X0–X5 and Y0–Y1.
Figure 4.8 Programming for PLC card I/O terminals

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The preceding instruction indicates that PRO1 (Y0) is connected when the PLC card PS1 (X0)
terminal is connected.
4.3 Interfaces for analog inputs and outputs
The VFD control board and PLC card provide a total of seven analog inputs and outputs for
Auto Station programming. (The number of analog input/output programming interfaces varies
depending on the actual product development.)
The following table lists the interfaces corresponding to the analog inputs and outputs of
GD350 and PLC card.
Table 4.2 Interfaces corresponding to the analog inputs and outputs of the VFD and PLC card
Auto Station
interface
variable name
D
element
VFD
function
code
Interface description
I_AI1
D7407
P17.19
0.00–10.00V/0.00–20.00mA. It is read only.
VFD analog input terminal AI1, corresponding to
0–1000/0–1000
I_AI2
D7408
P17.20
-10.00–10.00V. It is read only.
VFD analog input terminal AI2, corresponding to
-1000–1000
I_AI3
D7409
P19.09
0.00–10.00V/0.00–20.00mA. It is read only.
VFD I/O expansion card analog input terminal AI3,
corresponding to 0–1000/0–1000
C_SetAO1
D7627
/
0.00–10.00V/0.00–20.00mA. It is readable and
writable.
VFD analog output terminal AO1, corresponding to
0–1000/0–1000
C_SetAO2
D7628
/
0.00–10.00V/0.00–20.00mA. It is readable and
writable.
VFD I/O expansion card analog output terminal AO2,
corresponding to 0–1000/0–1000
C_SetAO3
D7629
/
Reserved.
C_Ai1Val
D7633
P27.24
0–10.00V/0.00–20.00mA. It is read only.
To use the PLC card input terminal AI1, you need to
configure SM172, SM173, and SM174. After the
setting, the input value (corresponding to
0–10000/0–10000) of the PLC card input terminal AI1
can be read from SD172 or D7633(C_Ai1Val). The
value is also synchronized to P27.24.
For SM172, the value 1 indicates enabling input, while
the default value 0 indicates disabling input.

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Auto Station
interface
variable name
D
element
VFD
function
code
Interface description
For SM174, the value 1 indicates current input, while
the default value 0 indicates voltage input.
SD173 specifies the sampling count.
C_Ao1Val
D7634
P27.25
0–10.00V/0.00–20.00mA. It is readable and writable.
To use the PLC card input terminal AO1, you need to
configure SM178 and SM179. After the setting, a
value (corresponding to 0–10000/0–10000) can be
written to SD178 to enable AO1 to output current or
voltage. The value is also synchronized to P27.25.
For SM178, the value 1 indicates enabling output,
while the default value 0 indicates disabling output.
For SM179, the value 1 indicates current output, while
the default value 0 indicates voltage output.
Note: D7634(C_Ao1Val) only has the display function
and cannot be used for programming. That is, writing
a value to D7634(C_Ao1Val) does not change the
output value of AO1.
1. Before setting the analog outputs of the VFD or I/O expansion card, set the function codes
P06.14 and P26.35. After values are written to C_SetAO1 (D7627) and C_SetAO2 (D7628),
corresponding analog values can be output on the VFD or I/O expansion card.
2. The program for configuring PLC card analog input terminal AI1 is as follows:
Figure 4.9 Input configuration for AI1 on the PLC card
The program indicates that AI1 input is enabled, current input is selected (J2 connected to AI),
and the sampling count is 5. The input current (corresponding to 0–10000) of AI1 can be read
from SD172 or D7633(C_Ai1Val).
3. The program for configuring PLC card analog output terminal AO1 is as follows: