INVT IVC-EH-4AD User manual

IVC-EH-4AD Analog Input Module
User Manual
Thanks for choosing the programmable logic controllers (PLCs) developed
and produced by INVT Auto-Control Technology (Shenzhen) Co., Ltd. Before
using the IVC-EH-4AD series PLC products, read this manual carefully to
understand the product features, so that you can install and use the products
properly and make full use of its abundant functions.
Note:
Before using the product, read the operation instructions and precautions
carefully to prevent accidents. Only trained personnel can install and operate
the product, and when installing and operating the product, the operators
must strictly follow the related industrial safety specifications and the
precautions and special safety guide provided in this manual to perform
operations properly.
1 Interface description
1.1 Interface introduction
Cover plates are provided for the extension cable interfaces and user
terminals of the IVC-EH-4AD module, as shown in Figure 1-1. You can see
the extension cable interfaces and user terminals after opening the cover
plates, as shown in Figure 1-2.
Figure 1-1 Module appearance
diagram
Figure 1-2 Module interface
diagram
The IVC-EH-4AD module is connected to the main module through a patch
board, and the extension modules are connected in cascade mode to
implement hard connection. For the specific connection method, see the
connection diagram in Figure 1-3.
Table 1-1 describes the definition of IVC-EH-4AD user terminals.
Table 1-1 Definition of IVC-EH-4AD user terminals
Label Description
24V+ Positive pole of the 24 V analog power supply
24V– Negative pole of the 24 V analog power supply
PG Ground terminal
V1+, V2+, V3+,
V4+ Voltage signal input terminals for channels 1, 2, 3, and 4
FG Shielding ground
I1+, I2+, I3+, I4+
Current signal input terminals for channels 1, 2, 3, and 4
VI1–, VI2–, VI3–,
VI4– Common ground terminals for channels 1, 2, 3, and 4
· Empty pin
Special statement: Voltage signals and current signals of a channel cannot
be input simultaneously. To detect current signals, short-circuit the voltage
signal input terminal of the channel to the current signal input terminal.
1.2 System connection
IVC-EH-4AD is applied to IVC3 series PLC systems. It can be connected to
an IVC3 series system through hard connection, that is, inserting it into the
extension interface of any extension module of the main module or system,
as shown in Figure 1-3.
After the IVC-EH-4AD module is connected to the system, its extension
interface can also be used to connect another extension module of the IVC3
series, such as the I/O extension module, VC-EH-4DA, IVC-EH-4TC, or
another IVC-EH-4AD.
The main module of an IVC3 series PLC can be extended with multiple I/O
extension modules and special function modules. The number of extension
modules depends on the power that the module can supply. For details, see
section 4.7 "Power supply specifications" in the IVC3 Series PLC User
Manual.
Figure 1-3 Diagram of the connection between IVC-EH-4AD analog
input modules and the main module
1.3 Wiring description
Figure 1-4 shows the user terminal wiring requirements. Pay attention to the
following seven aspects:
1. It is recommended that you connect the analog input by using a shielded
twisted-pair cable, and keep the cable away from power cables or other
cables that may cause electrical interference.
2. If fluctuation occurs in input signals, or external cables cause electrical
interference, it is recommended that you configure a smoothing capacitor
(0.1μF to 0.47μF/25V).
3. If current input is adopted for a channel, short-circuit the voltage input
terminal of the channel to the current input terminal.
4. If too much electrical interference is caused, connect the shielding ground
FG to the ground terminal PG of the module.
5. Ground the ground terminal PG of the module properly.
6. The auxiliary 24 V DC output power supply or any other power supply that
meets requirements can be used as the analog power supply.
7. Do not use the empty pin of the user terminal.
I1 +
⑦
⑤
C H 1
⑥
24 V+
2 4 V-
D C /D C
co nve rte
r
A G N D
+5 V
-5 V
PGND
PG
IV C 2 L -4 AD
DC24V±10%
60mA
V 1 +
V I1 -
FG
A G N D
250Ω
④
1 30 K Ω
1 30 K Ω
3 90 K Ω
3 90 K Ω
A G N D
C ur ren t sig n a l
I4 + C H 4
V 4 +
V I4 -
FG
A G N D
250Ω
1 30 K Ω
1 30 K Ω
3 90 K Ω
3 90 K Ω
A G N D
V olta ge sig n a l
①
②
②
③
①
Figure 1-4 IVC-EH-4AD user terminal wiring diagram
2 Instructions
2.1 Power supply specifications
Table 2-1 Power supply specifications
Item
Description
Analog circuit
24 V DC (-15%–+20%); Max. allowable ripple voltage: 5%;
50 mA (supplied by the main module or external power
supply)
Digital circuit 5 V DC, 72 mA (supplied by the main module)

2.2 Performance specifications
Table 2-2 Performance specifications
Item Specification
Converting
speed 4 ms/channel
Analog
input
range
Voltage
input
-10 V–+10 V, with an input
impedance of 1 MΩ
You can use 4 channels
simutaneously, and select
the input range by setting
the buffer memory (BFM)
(for details, see the
description in Table 2-4).
Current
input
-20 mA–+20 mA or -5
V–+5 V, with an input
impedance of 250 Ω
Digital output Default setting: -10000–+10000
Max. allowable user setting range: -10000–+10000
Reso
lution
Voltage
input Depending on the input range
Current
input 10μA
Precision ±1% of the full range
Isolation
Analog circuits are isolated from digital circuits by using
photoelectric couplers. Analog circuits are isolated from
the internal 24 V DC power supply of the module. Analog
channels are not isolated from each other.
2.3 BFM
The IVC-EH-4AD module can exchange information with the main module
through the buffer memory (BFM) in either of the following operation modes:
Mode 1
The channels and converting results are set quickly in the configuration
interfaces. This is also a common mode in which special extension modules
are set.
Mode 2
1. The main module writes information to the BFM of IVC-EH-4AD through
TO instructions to set IVC-EH-4AD.
2. The main module reads the AD converting results of IVC-EH-4AD and
other information in the BFM through FROM instructions.
Table 2-3 describes the information in the BFM of IVC-EH-4AD.
Table 2-3 Information in the BFM of IVC-EH-4AD
BFM Information Default value
*#100
Average value of channel 1 0
*#101
Average value of channel 2 0
*#102
Average value of channel 3 0
*#103
Average value of channel 4 0
#200
Current value of channel 1 0
#201
Current value of channel 2 0
#202
Current value of channel 3 0
#203
Current value of channel 4 0
#300
Module fault state word 0X0000
#400
Initialization instruction Default value: 0
#500
Setting modification allowing
instruction
Default value: 1 (modification
allowed)
#700
Channel 1 mode word 0x0000
#701
Channel 2 mode word 0x0000
#702
Channel 3 mode word 0x0000
#703
Channel 4 mode word 0x0000
#800
Number of points of channel 1
average value 8 (1-4096)
#801
Number of points of channel 2
average value 8 (1-4096)
#802
Number of points of channel 3
average value 8 (1-4096)
#803
Number of points of channel 4
average value 8 (1-4096)
*#900
CH1-D0 0 (input mode 0)
#901
CH1-A0 0 (input mode 0)
*#902
CH1-D1 10000 (input mode 0)
BFM Information Default value
#903
CH1-A1 10000 (input mode 0)
*#904
CH2-D0 0 (input mode 0)
#905
CH2-A0 0 (input mode 0)
*#906
CH2-D1 10000 (input mode 0)
#907
CH2-A1 10000 (input mode 0)
*#908
CH3-D0 0 (input mode 0)
#909
CH3-A0 0 (input mode 0)
*#910
CH3-D1 10000 (input mode 0)
#911
CH3-A1 10000 (input mode 0)
*#912
CH4-D0 0 (input mode 0)
#913
CH4-A0 0 (input mode 0)
*#914
CH4-D1 10000 (input mode 0)
#915
CH4-A1 10000 (input mode 0)
#4094
Module software version
information 0X1000
#4095
Module identification code 0X1042
Description:
1. Only for buffers with the asterisk (*), the main module can write
information to the BFM of IVC-EH-4AD through TO instructions and read
information of any unit in the BFM through FROM instructions. If the main
module reads information from a reserved unit, the value 0 is obtained.
2. The input mode depends on the value of BFM#700. #700 determines
control channel 1, #701 determines control channel 2, #702 determines
control channel 3, and #703 determines control channel 4. Table 2-4
describes the meaning of the values of the characters.
Table 2-4 BFM#700 information table
BFM#700
State information Corresponding digial value
0 Channel disabled
1 Input range: -10 V–+10 V –10000–+10000
2 Input range: -5 V–+5 V or -20
mA–+20 mA
–10000–+10000
3 Input range: 1 V–5 V or 4
mA–20 mA
0–10000
For example, if "0x0001" is written into the #700 unit, the following
information is set:
Input range of channel 1: -10 V–+10 V
3. The units BFM#800 to BFM#803 are the setting buffer memory for the
average number of channel sampling times. The value ranges from 1 to
4096, and the default value 8 indicates that the average number of
channel sampling times is 8.
4. 4. The units BFM#900 to BFM#915 are buffers for channel characteristic
settings, and channel characteristics are set in two-point mode. D0 and
D1 indicate the digital output of the channel, A0 and A1 indicate the
actual input (in the unit of mV) of the channel, and each channel uses 4
words. To simplify the setting of users without affecting the
implementation of functions, the values of A0 and A1 are fixed to 0 and
the maximum value of the analog in the applied mode. The values
change with the modification of channel mode words (such as BFM#700).
Users cannot modify these two items.
Note: If current signals (-20 mA–+20 mA) of a channel is input, you need
to set the mode of the channel to 2. The internal measurement of
channels is based on voltage signals, therefore, the current signals are
converted into voltage signals (-5 V–+5 V) by the 250 Ω resistor on the
current input terminal of the channel (see Figure 1-4). The value of A1 in
characteristic setting area corresponding to the channel is still in mV, that
is, 5000 mV (20 mA × 250 Ω = 5000 mV). For how the channel
characteristics change with the modification of D0, A0, D1, and A1, see
chapter 3 "Characteristic setting".
5. For state information of BFM#300, see Table 2-5.

Table 2-5 State information of BFM#300
Bit state of
BFM#300 ON OFF
b0: Error
If anly of the bit states b1 to b2 is on,
AD conversion of all channels is
stopped.
No error
b1: Channel
characteristic setting
error
Exceptions occur in the channel
characteristic data in the BFM or
adjustment errors occur.
The channel
characteristic
data is
normal.
b2: Power supply
fault 24 V DC power supply fault
The power
supply works
properly.
6. When BFM#400 is set to 1, that is, when it is activated, all the settings of
the module are reset to the default values.
7. BFM#500 is used to disable the modification of the I/O characteristic.
After BFM#500 is set to 0, you cannot modify the I/O characteristic until
BFM#500 is set to 1. The setting is saved at power outage.
8. BFM#4094 contains the module software version information. You can
use the FROM instruction to read the information.
9. BFM#4095 contains the module identification code. The identification
code of IVC-EH-4AD is 0X1042. User programs on the PLC can use this
code to identify the special module IVC-EH-4AD before transmitting or
receiving data.
3 Characteristic setting
The input channel characteristic of IVC-EH-4AD is the linear relationship
between the analog input A and digital output D of the channel. You can set
the characteristic. Each channel can be understood as the model shown in
Figure 3-1. Since it is linear, the characteristic of a channel can be
determined by identifying two points, P0 (A0, D0) and P1 (A1, D1). D0
indicates the channel digital output when the analog input is A0, and D1
indicates the channel digital output when the analog input is A1.
Figure 3-1 Channel characteristic of IVC-EH-4AD
To simplify the setting of users without affecting the implementation of
functions, the values of A0 and A1 are fixed to 0 and the maximum value of
the analog in the applied mode, that is, in Figure 3-1, A0 is 0 and A1 is the
maximum analog input in the applied mode. The values change with the
modification of channel mode words (such as BFM#700). Users cannot
modify these two items.
If you do not modify D0 and D1 of each channel and only set the channel
mode (BFM#700), the characteristic of each mode is the default one, as
shown in Figure 3-2. The characteristics A, B, and C in Figure 3-2 are factory
settings.
0
D
-10000
(mV)
-10000
A
10000
A. Mode 1, D0=0, D1=10000
The input of 10 V corresponds to digital output of 10000.
The input of 0 V corresponds to digital output of 0.
The input of -10 V corresponds to digital output of -10000.
10000
Figure 3-2 Default channel characteristic of each mode when D0 and D1
are not modified
If D0 and D1 of a channel are modified, the characteristic of the channel is
changed. D0 and D1 can be set to any value ranging from -10000 to +1000. If
the setting exceeds the range, IVC-EH-4AD does not receive the setting and
keep the original valid setting.
4 Application instance
4.1 Configuring the extension module
through the configuration interface
Example: The address of the IVC-EH-4AD module is 1 (for the addressing
method of special function modules, see the IVC-EH-4AD Series PLC User
Manual). Channel 1 is disabled, channel 2 and 3 are set to input voltage
signals (-10 V–+10 V), channel 4 is set to input current signals (4–20 mA), the
number of points of the average values is set to 8 by default, and data
registers D2, D3, and D4 are used to receive the conversion results of the
average values.
You can configure registers directly in the provided extension module
configuration interface instead of using FROM and TO instructions. The
configuration steps are as follows:
1. Double-click the extension module configuration tab in the System
block category on Project Manager.
2. Double-click the module to be configured on the right instruction tree to
add it to the configuration.
3. After configuring all the parameters, click OK to complete the
configuration.
After the configuration is complete, the user program needs only to use
the configured D element to communicate with the special function
module instead of using FROM and TO instructions. After the
compiling is verified, the system block is downloaded to the main
module with the user program. Figure 4-1 shows the configuration
interface.
Figure 4-1 IVC-EH-4AD configuration interface

4.2 Configuring the extension module through
instructions
Example: The address of the IVC-EH-4AD module is 3 (for the addressing
method of special function modules, see the IVC-EH-4AD Series PLC User
Manual), and the number of points of the average values is 8 by default. The
following figure shows the modification of the characteristics shown in Figure
3-2. Channel 1 is disabled, the characteristic of channel 2 is modified to A in
Figure 3-2, that of channel 3 is modified to B, that of channel 4 is modified to
C, and data registers D2, D3, and D4 are used to receive the conversion
results of the average values.
5 Running inspection
5.1 Routine inspection
1. Check whether the wiring of the analog input meets the requirements.
Refer to section 1.3 "Wiring description".
2. Check whether IVC-EH-4AD is firmly inserted into the extension
interface.
3. Check whether the 5 V and 24 V power supplies are overloaded. Note:
The power of the digital part of IVC-EH-4AD is supplied by the main
module through the extension interface.
4. Check the application program and ensure that the correct operation
method and parameter range are selected in the application.
5. Set the main module of IVC-EH-4AD to the RUN state.
5.2 Fault checking
If IVC-EH-4AD does not run properly, check the following items:
• Check the state of the "POWER" indicator.
On: The extension interface is connected properly.
Off: Check the status of the extension connection and the main module.
• Check the analog wiring.
• Check the state of the "24V" indicator.
On: The 24 V DC power supply works properly.
Off: The 24 V DC power supply may be faulty. If the 24 V DC power
supply works properly, IVC-EH-4AD is faulty.
• Check the state of the "RUN" indicator.
Blinking at a high frequency: IVC-EH-4AD runs properly.
Blinking at a low frequency or off: Check the information in BFM#300.
User notice
1. The warranty covers only the PLC machine.
2. The warranty period is 18 months. We provide free-of-charge
maintenance and repairs for the product if it is faulty or damaged during
proper operation within the warranty period.
3. The warranty period starts from the ex-factory date of the product. The
machine No. is the only basis for determining whether the machine is
within the warranty period. A device without the machine No. is deemed
out-of-warranty.
4. Maintenance and repair fees are charged in the following scenarios even
the product is within the warranty period:
• Faults are caused due to misoperations. Operations are not performed
following the instructions provided in the manual.
• The machine is damaged due to causes such as fire, flood, or voltage
exceptions.
• The machine is damaged due to improper use. You use the machine to
perform some unsupported functions.
5. The service fees are calculated based on the actual fees. If there is a
contract, the provisions stated in the contract prevail.
6. Keep this warranty card. Show it to the maintenance unit when you seek
maintenance services.
7. Contact the local dealer or directly contact our company if you have any
questions.
Customer Service Center (China)
INVT Auto-Control Technology (Shenzhen) Co., Ltd.
Address: West Side, Floor 6, Building B, INVT Guangming Technology
Building, Songbai Road, Matian, Guangming District, Shenzhen,
China
Postal code: 518106
Company website: http://www.invt-control.com/en/index.html
All rights reserved. The content of this manual is subject to change without
prior notice.
Customer Service Center
INVT Auto-Control Technology (Shenzhen) Co., Ltd.
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model Installation date
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Address: West Side, Floor 6, Building B, INVT Guangming Technology
Building, Songbai Road, Matian, Guangming District, Shenzhen,
China
Postal code: 518106