ICPDAS i-7005, M-7005 User Manual
i-7005 and M-7005
User’s Manual
Warranty
All products manufactured by ICP DAS are under
warranty regarding defective materials for a period of one
year from the date of delivery to the original purchaser.
Warning
ICP DAS assumes no liability for damages resulting
from the use of this product. ICP DAS reserves the right
to change this manual at any time without notification.
The information furnished by ICP DAS is believed to be
accurate and reliable. However, no responsibility is
assumed by ICP DAS for its use, or for any infringements
of patents or other rights of third parties resulting from its
use.
Copyright
Copyright 1999 - 2007 ICP DAS. All rights reserved.
Trademark
The names used for identification only may be
registered trademarks of their respective companies.
Date: 2007/08/21
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
1
Table of Contents
1. Introduction............................................................................... 5
1.1 More Information.............................................................. 7
1.2 Terminal Assignment........................................................ 8
1.3 Specifications.................................................................... 9
1.4 Block Diagrams .............................................................. 10
1.4.1 Block Diagram for the i-7005/M-7005 .................. 10
1.5 Dimensions ..................................................................... 11
1.5.1 i-7005 and M-7005 Dimensions ............................ 11
1.6 Wiring ............................................................................. 12
1.6.1 i-7005/M-7005 Wiring........................................... 12
1.6.2 Wiring Recommendations...................................... 12
1.7 Quick Start ...................................................................... 13
1.8 Default Settings............................................................... 15
1.9 Calibration ...................................................................... 16
1.10 Configuration Tables .................................................... 18
1.11 User-defined Types....................................................... 23
1.12 Digital Outputs and Alarms .......................................... 25
1.13 M-7000 Notes ............................................................... 26
1.13.1 Protocol Switching............................................... 26
1.13.2 INIT Mode ........................................................... 27
1.14 Mounting....................................................................... 28
1.14.1 Din-Rail Mounting............................................... 28
1.14.2 Piggyback Mounting............................................ 30
1.14.3 Wall Mounting ..................................................... 30
1.15 Technical Support ......................................................... 31
2. DCON Protocol....................................................................... 32
2.1 %AANNTTCCFF ........................................................... 36
2.2 #** .................................................................................. 39
2.3 #AA................................................................................. 41
2.4 #AAN.............................................................................. 43
2.5 $AA0Ci........................................................................... 45
2.6 $AA1Ci........................................................................... 47
2.7 $AA2............................................................................... 49
2.8 $AA4............................................................................... 51
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
2
2.9 $AA5............................................................................... 53
2.10 $AA5VV....................................................................... 55
2.11 $AA6............................................................................. 57
2.12 $AA7CiRrr.................................................................... 59
2.13 $AA8Ci......................................................................... 61
2.14 $AAB ............................................................................ 63
2.15 $AAF ............................................................................ 65
2.16 $AAI ............................................................................. 66
2.17 $AAM ........................................................................... 68
2.18 $AAP ............................................................................ 69
2.19 $AAPN.......................................................................... 71
2.20 $AAS0 .......................................................................... 73
2.21 $AAS1 .......................................................................... 74
2.22 ~AAD............................................................................ 76
2.23 ~AADT ......................................................................... 78
2.24 ~AAEV ......................................................................... 80
2.25 ~AAI (Soft INIT command) ......................................... 82
2.26 ~AAO(Name) ............................................................... 84
2.27 ~AATnn ........................................................................ 86
2.28 @AAGxTtt ................................................................... 89
2.29 @AARTTttR(Data) ...................................................... 91
2.30 @AASxTttC(data) ........................................................ 93
2.31 @AACHCi.................................................................... 95
2.32 @AACLCi .................................................................... 97
2.33 @AADHCi ................................................................... 99
2.34 @AADI....................................................................... 101
2.35 @AADLCi.................................................................. 103
2.36 @AADODD................................................................ 105
2.37 @AAHI(data)CiTOj ................................................... 107
2.38 @AALO(data)CiTOj .................................................. 109
2.39 @AARAOj ................................................................. 111
2.40 @AARHCi.................................................................. 113
2.41 @AARLCi .................................................................. 115
2.42 @AAROOj ................................................................. 117
2.43 ~** .............................................................................. 119
2.44 ~AA0........................................................................... 120
2.45 ~AA1........................................................................... 122
2.46 ~AA2........................................................................... 124
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
3
2.47 ~AA3EVV .................................................................. 126
2.48 ~AA4........................................................................... 128
2.49 ~AA5PPSS.................................................................. 130
3. Modbus RTU Protocol.......................................................... 132
3.1 01 (0x01) Read Digital Output Status........................... 133
3.2 02 (0x02) Read Input Status.......................................... 134
3.3 04 (0x04) Read Input Channels .................................... 135
3.4 05 (0x05) Write Single Digital Output.......................... 136
3.5 15 (0x0F) Write Multiple Digital Output Channels...... 137
3.6 70 (0x46) Read/Write Module Settings ........................ 138
3.6.1 Sub-function 00 (0x00) Read module name ........ 139
3.6.2 Sub-function 04 (0x04) Set module address ........ 140
3.6.3 Sub-function 05 (0x05) Read communication
settings
.......................................................................... 141
3.6.4 Sub-function 06 (0x06) Set communication settings
...................................................................................... 142
3.6.5 Sub-function 07 (0x07) Read type code............... 143
3.6.6 Sub-function 08 (0x08) Set type code.................. 144
3.6.7 Sub-function 32 (0x20) Read firmware version... 145
3.6.8 Sub-function 37 (0x25) Read channel
enabled/disabled status
.................................................. 146
3.6.9 Sub-function 38 (0x26) Set channel enable/disable
...................................................................................... 147
3.6.10 Sub-function 41 (0x29) Read miscellaneous
settings
.......................................................................... 148
3.6.11 Sub-function 42 (0x2A) Write miscellaneous
settings
.......................................................................... 149
4. Troubleshooting .................................................................... 150
4.1 Communicating with the module.................................. 151
4.2 Reading Data................................................................. 152
A. Appendix.............................................................................. 153
A.1 INIT Mode ................................................................... 153
A.2 Dual Watchdog Operation............................................ 155
A.3 Frame Ground .............................................................. 156
A.4 Node Information Area ................................................ 158
A.5 Thermistor.................................................................... 159
A.6 Resistance Measurement.............................................. 160
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
4
1. Introduction
The i-7000 series is a family of network data acquisition
and control modules, providing analog-to-digital, digitalto-analog, digital input/output, timer/counter and other
functions. The modules can be remotely controlled using a
set of commands, which we call the DCON protocol.
Communication between the module and the host is in
ASCII format via an RS-485 bi-directional serial bus
standard. Baud Rates are software programmable and
transmission speeds of up to 115.2 Kbps can be selected.
Some i-7000 modules feature
a new design for the frame
ground and INIT switch as
shown in the figure (rear
view). The frame ground
provides enhanced static
protection (ESD) abilities and
ensures the module is more
reliable. The INIT switch
allows easier access to INIT
mode. Please refer to Sections
A.1 and A.3 for more details.
The common features of the i-7005 and M-7005 modules
are as follows:
1. 24-bit sigma-delta ADC to provide excellent accuracy
2. Direct thermistor connection
3. Software calibration
The i-7005/M-7005 is an 8-channel thermistor input and
6-channel digital output module
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
5
Supported thermistor types are as follows:
1. PreCon Type III, Model 3, 10,000 Ohms at 25°C (77°F)
2. Fenwell Type U, 2000 Ohms at 25°C
3. YSI L Mix, 100 Ohms at 25°C
4. YSI L Mix, 300 Ohms at 25°C
5. YSI L Mix, 1000 Ohms at 25°C
6. YSI B Mix, 2252 Ohms at 25°C
7. YSI B Mix, 3000 Ohms at 25°C
8. YSI B Mix, 5000 Ohms at 25°C
9. YSI B Mix, 6000 Ohms at 25°C
10. YSI B Mix, 10000 Ohms at 25°C
11. YSI H Mix, 10000 Ohms at 25°C
12. YSI H Mix, 30000 Ohms at 25°C
13. User-defined
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
6
1.1 More Information
For more information regarding the i-7000 series, please
refer to chapter 1 of the “i-7000 Bus Converter User’s
Manual” as shown below or visit the ICP DAS website
http://www.icpdas.com.
1.1 The 7000 Series Overview
1.2 Related Documentation for the 7000 Series
1.3 Common Features of the 7000 Series
1.4 The 7000 Series System Network Configuration
1.5 7000 Dimensions
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
7
1.2 Terminal Assignment
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
8
1.3 Specifications
i-7005/M-7005
Analog Input
Input Channels 8
Input Type Thermistor
Thermistor Type PreCon Type III, Fenwell Type U,
YSI L 100, YSI L 300, YSI L 1000,
YSI B 2252, YSI B 3000,
YSI B 5000, YSI B 6000, YSI B
10000, YSI H 10000, YSI H 30000,
User-defined
Temperature Scale Celsius, Fahrenheit
Sampling Rate 8 samples/sec
Bandwidth 5.24 Hz
Accuracy
±0.1%
Zero Drift
0.5 μV/°C
Span Drift
20 μV/°C
CMR@50/60Hz 86 dB min
NMR@50/60Hz 100 dB min
Isolation 3000 VDC
Open Wire Detection Yes
Individual Channel
Configurable
Yes
Digital Output
Output Channels 6
Output Type Open collector
Output Load 30 V, 100 mA max.
Modbus RTU
M-7005
Power
Requirement +10 to +30 VDC
Consumption 1.1 W
Temperature Range
Operating -25°C to +75°C
Storage -30°C to +75°C
Note: A warm up period of 30 minutes is recommended in order to achieve
the complete performance results described in the specifications.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
9
1.4 Block Diagrams
1.4.1 Block Diagram for the i-7005/M-7005
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
10
1.5 Dimensions
1.5.1 i-7005 and M-7005 Dimensions
Back View
Top View
Front View
Side View
Unit : mm
lnit
Normal
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
11
1.6 Wiring
1.6.1 i-7005/M-7005 Wiring
Thermistor connection
Digital output connectoin
1.6.2 Wiring Recommendations
Use 26-12 AWG wire for signal connections.
Strip the wire to a length of 7±0.5mm.
Use a crimp terminal for wiring.
Avoid high-voltage cables and power equipment as
much as possible.
For RS-485 communication, use insulated and
twisted pair 24 AWG wire, e.g. Belden 9841.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
12
1.7 Quick Start
To install the module, follow the steps below:
1. Connect the thermistor sensor. See Section 1.2 for the
terminal assignment and Section 1.6 for the wiring
diagram.
2. Connect the module to the RS-485 network using the
DATA+ and DATA- terminals. See Section 1.2 for the
terminal assignment. If the host is only equipped with
an RS-232 interface, then an RS-232 to RS-485
converter will be required. Refer to the “i-7000 Bus
Converter User’s Manual” for more information.
3. Connect the module to the power supply using the +Vs
and GND terminals. See Section 1.2 for the terminal
assignment. Note that the voltage supplied to the
module should be in the range of +10 to +30
VDC.
4. Configure the module by sending the
%AANNTTCCFF command. See Section 2.1 for
details. To configure the i-7005, the $AA7CiRrr
command must also be sent. See Section 2.12 for
details. For M-7000 modules using the Modbus RTU
protocol, configure the module using the following
functions.
Sub-function 04h of Function 46h, see Section 3.6.2
Sub-function 06h of Function 46h, see Section 3.6.4
Sub-function 08h of Function 46h, see Section 3.6.6
The default settings for the module can be found in
Section 1.8.
5. For the i-7005, send the ~AADT command to set the
temperature scaling. See Section 2.23 for details.
6. To read data from the input channels, send either the
#AA or #AAN commands to the module. See Sections
2.3 and 2.4 for details. For M-7000 modules using the
Modbus RTU protocol, use Function 04h to read the
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
13
data from the input channels. See Section 3.3 for
details.
7. If the host is a PC with a Windows operating system
installed, the DCON Utility can be used to allow easy
configuration and reading of data. The DCON Utility
can be downloaded from the ICP DAS website
(
http://www.icpdas.com). The documentation for the
DCON Utility can be found in the ”Getting Started
For i-7000 Series Modules” manual.
Please refer to the “i-7000 Bus Converter User’s
Manual” and ”Getting Started For i-7000 Series
Modules” manuals for more details. The “Getting
Started For i-7000 Series Modules” manual can be
downloaded from the ICP DAS website
(http://www.icpdas.com).
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
14
1.8 Default Settings
Default settings for the i-7005 are as follows:
。 Module Address: 01
。 Thermistor Type: Type 60, PreCon Type III, -30°F to
240°F
。 Baud Rate: 9600 bps
。 Checksum disabled
。 Engineering unit format
。 Temperature Scale: Celsius (the i-7005 also supports
Fahrenheit)
Default settings for the M-7005 modules are as follows:
▫ Protocol: Modbus RTU
▫ Module Address: 01
▫ Thermistor Type: Type 60, PreCon Type III, -30°F to
240°F for I-7005
▫ Baud Rate: 9600 bps
▫ Temperature Scale: Celsius (the M-7005 also
supports Fahrenheit for DCON protocol)
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
15
1.9 Calibration
Warning: It is not recommended that calibration be
performed until the process is fully understood.
The calibration procedure is as follows:
1. Warm up the module for at least 30 minutes.
2. Set the type code to the type you wish to calibrate.
Refer to Section 2.12 for details.
3. Enable calibration. Refer to Section. 2.24 for details.
4. Connect the zero calibration resistor.
5. Send the zero calibration command. Refer to Section
2.5 for details.
6. Connect the span calibration resistor.
7. Send the span calibration command. Refer to Section
2.6 for details.
8. Repeat steps 3 to 7 three times.
Notes:
1. For the i-7005 and M-7005, each channel should be
calibrated separately.
2. For the i-7005 and M-7005, types 71 to 77 must be
calibrated for each channel.
3. Calibration resistors are shown on the next page.
4. The M-7000 series modules must be switched to the
DCON protocol mode before calibrating. Refer to
Sections 1.13.1 and 3.6.4 for details of the switching
protocol.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
16
Calibration resistor types used by the i-7005 and
M-7005
Type Zero Calibration Resistor Span Calibration Resistor
71 0 Ohms 2700 Ohms
72 0 Ohms 5600 Ohms
73 0 Ohms 12000 Ohms
74 0 Ohms 22000 Ohms
75 0 Ohms 47000 Ohms
76 0 Ohms 91000 Ohms
77 0 Ohms 150000 Ohms
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
17
1.10 Configuration Tables
Baud Rate Setting (CC)
Code
03 04 05 06 07 08 09 0A
Baud rate
1200 2400 4800 9600 19200 38400 57600 115200
Note: The data bits are fixed at one start bit, eight data bits, no parity and
one stop bit for the i-7000 and M-7000 series.
Temperature Sensor Type Setting (TT)
Type Code Temperature Sensor Type Temperature Range °C
60 PreCon Type III 10K @ 25°C -30°F ~ 240°F
61 Fenwell Type U 2K @ 25°C -50 ~ 150
62 Fenwell Type U 2K @ 25°C 0 ~ 150
63 YSI L Mix 100 @ 25°C -80 ~ 100
64 YSI L Mix 300 @ 25°C -80 ~ 100
65 YSI L Mix 1000 @ 25°C -70 ~ 100
66 YSI B Mix 2252 @ 25°C -50 ~ 150
67 YSI B Mix 3000 @ 25°C -40 ~ 150
68 YSI B Mix 5000 @ 25°C -40 ~ 150
69 YSI B Mix 6000 @ 25°C -30 ~ 150
6A YSI B Mix 10000 @ 25°C -30 ~ 150
6B YSI H Mix 10000 @ 25°C -30 ~ 150
6C YSI H Mix 30000 @ 25°C -10 ~ 200
70 User-defined -50 ~ 150
71 User-defined -50 ~ 150
72 User-defined -50 ~ 150
73 User-defined -50 ~ 150
74 User-defined -50 ~ 150
75 User-defined -50 ~ 150
76 User-defined -50 ~ 150
77 User-defined -50 ~ 150
Note: Please refer to Section 1.11 for details of user-
defined types.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
18
Data Format Setting (FF)
7 6 5 4 3 2 1 0
FS CS reserved DF
Key Description
DF Data format
00: Engineering unit
01: % of FSR (full scale range)
10: 2’s complement hexadecimal
11: Ohms
CS Checksum setting
0: Disabled
1: Enabled
FS This setting is reserved for the i-7005 and
M-7005 and should be zero.
Note: The reserved bits should be zero.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
19
Thermistor Type and Data Format Table
Type Code Thermistor
Type
Data Format +F.S. -F.S.
Engineering unit +240.00 -030.00
% of FSR +100.00 -012.50
2’s comp HEX 7FFF F000
60
PreCon Type
III
10K @ 25°C
-30 ~ 240°F
Ohms +000539.4 +173600.0
Engineering unit +150.00 -050.00
% of FSR +100.00 -033.33
2’s comp HEX 7FFF D556
61
Fenwell U
2K @ 25°C
-50 ~ 150°C
Ohms +000037.2 +134020.0
Engineering unit +150.00 +000.00
% of FSR +100.00 +000.00
2’s comp HEX 7FFF 0000
62
Fenwell U
2K @ 25°C
0 ~ 150°C
Ohms +000037.2 +006530.0
Engineering unit +100.00 -080.00
% of FSR +100.00 -080.00
2’s comp HEX 7FFF 999A
63
YSI L Mix
100 @ 25°C
-80 ~ 100°C
Ohms +000014.3 +014470.0
Engineering unit +100.00 -080.00
% of FSR +100.00 -080.00
2’s comp HEX 7FFF 999A
64
YSI L Mix
300 @ 25°C
-80 ~ 100°C
Ohms +000035.8 +067660.0
Engineering unit +100.00 -070.00
% of FSR +100.00 -070.00
2’s comp HEX 7FFF A667
65
YSI L Mix
1000 @ 25°C
-70 ~ 100°C
Ohms +000106.4 +132600.0
Engineering unit +150.00 -050.00
% of FSR +100.00 -033.33
2’s comp HEX 7FFF D556
66
YSI B Mix
2252 @ 25°C
-50 ~ 150°C
Ohms +000041.8 +151000.0
Engineering unit +150.00 -040.00
% of FSR +100.00 -026.67
2’s comp HEX 7FFF DDDE
67
YSI B Mix
3000 @ 25°C
-40 ~ 150°C
Ohms +000055.6 +101000.0
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
20
Type Code Thermistor
Type
Data Format +F.S. -F.S.
Engineering unit +150.00 -040.00
% of FSR +100.00 -026.67
2’s comp HEX 7FFF DDDE
68
YSI B Mix
5000 @ 25°C
-40 ~ 150°C
Ohms +000092.7 +168300.0
Engineering unit +150.00 -030.00
% of FSR +100.00 -020.00
2’s comp HEX 7FFF E667
69
YSI B Mix
6000 @ 25°C
-30 ~ 150°C
Ohms +000111.5 +106200.0
Engineering unit +150.00 -030.00
% of FSR +100.00 -020.00
2’s comp HEX 7FFF E667
6A
YSI B Mix
10K @ 25°C
-30 ~ 150°C
Ohms +000185.9 +177000.0
Engineering unit +150.00 -030.00
% of FSR +100.00 -020.00
2’s comp HEX 7FFF E667
6B
YSI H Mix
10K @ 25°C
-30 ~ 150°C
Ohms +000237.0 +135200.0
Engineering unit +200.00 -010.00
% of FSR +100.00 -005.00
2’s comp HEX 7FFF F99A
6C
YSI H Mix
30K @ 25°C
-10 ~ 200°C
Ohms +000186.7 +158000.0
Engineering unit +150.00 -050.00
% of FSR +100.00 -033.33
2’s comp HEX 7FFF D556
70 ~ 77
User-defined
-50 ~ 150°C
Ohms +000000.0 +000000.0
Note:
1. For user-defined types, if the resistance is larger than
180000 ohms, then it is treated as under range.
2. Refer to Section 1.11 for more information regarding
user-defined types.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
21
Thermistor Over Range/Under Range Reading for the
i-7005 and M-7005
Over Range Under Range
Engineering Unit +9999.9 -9999.9
% of FSR +999.99 -999.99
2’s Complement HEX 7FFF 8000
Thermistor Over Range/Under Range Reading for the
M-7005 with Modbus RTU protocol
Over Range Under Range
7FFFh 8000h
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
22
1.11 User-defined Types
For a typical thermistor, the relationship between resistance and
temperature can be expressed by the Steinhart–Hart equation
1/T = A + B lnR
T
+ C (lnRT)
3
where RT is the resistance in ohms at temperature T in degrees
Kelvin (K = °C + 273.15). The values of A, B, and C are called
Steinhart Coefficients. The error of the equation is less than +/-
0.01°C in a 100°C span.
i-7005 and M-7005 support user-defined types by specifying the
Steinhart coefficients using the @AASxTttC(data) command, see
Section 2.30. The data sent is a 32-bit hexadecimal value in
IEEE-754 standard format:
Bits Description
31 (sign) 0 = positive, 1 = negative
30-23 (exponent) The exponent base is 2. The actual exponent is
calculated by subtracting 127 from the stored
value.
22-00 (mantissa) The mantissa is expressed as 1.f where f is the
fractional part and is stored in this field.
Example:
For the hexadecimal value C3694000h
1. Bit 31is 1, indicating a negative number.
2. The value of bits 30-23 is 10000110 binary or 134 decimal.
The exponent is 7, 134-127.
3. The mantissa is 1.11010010100000000000000 binary.
4. Adjust the mantissa for the exponent. The adjusted mantissa
is 11101001.0100000000000000 binary. That is 233.25
decimal.
5. Considering the sign bit. The floating-point number of
C3694000h is –233.25.
The following methods can be used to obtain the Steinhart
Coefficients of a thermistor.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
23
1. Ask the manufacturer. Usually, thermistor manufacturers
publish data for the Steinhart Coefficients for their thermisotr
products.
2. Solve the coefficients by using three known data sets: (R1,
T1), (R2, T2) and (R3, T3), which can be obtained by
referring to the published Resistance versus Temperature data
table of the thermistor. They can be obtained by measurement
if no published data table is available. In order to achieve the
most accurate results, the following values are recommended:
-40°C ≦ T1, T2, T3 ≦ 150°C and
|T2 – T1| ≦ 50°C, |T3 – T2| ≦ 50°C.
The DCON Utility, available for downloaded from the ICP DAS
website (
http://www.icpdas.com), can assist with the calculation
of the Steinhart Coefficients and the conversion to IEEE-754
format. Documentation for the DCON Utility can be found in
the ”Getting Started For i-7000 Series Modules” manual.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
24
1.12 Digital Outputs and Alarms
The i-7005/M-7005 supports digital outputs that can also
be used as alarm outputs. When a host watchdog timeout
occurs, the “safe value” is loaded into the digital output
ports. The digital output command @AADODD, see
Section 2.36, has no effect on the digital output ports until
the host watchdog timeout status is cleared. See Section
A.2 for host watchdog details. If the host watchdog
timeout status has not been cleared when the module is
powered on, then the safe value is loaded into the digital
output ports. Otherwise, the “power-on value” is loaded
into the digital output ports.
The alarm function is performed by comparing the analog
input value to the high/low limits stored in the non-volatile
memory. The result of the limit check can then be used to
control a digital output port. All digital output ports can
be used as an alarm output and are programmable. When
a digital output port is associated with an alarm, it is not
affected by the safe value, power-on value or the digital
output command @AADODD. There are two types of
alarm:
1. Momentary alarm: The alarm status is set only when
the analog input value exceeds the alarm limitation.
When the analog input value is within the limit, the
alarm status is cleared.
2. Latched alarm: The alarm status is set when the analog
input value exceeds the alarm limitation. After that, it
is cleared only when the clear latched alarm command
is sent.
Use the set high/low alarm commands, see Sections 2.37
and 2.38, to set the alarm limit, alarm type, alarm checking
channel and alarm port.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
25
1.13 M-7000 Notes
The main difference between the i-7000 and M-7000
series is that the M-7000 series has additional support for
the Modbus RTU communication protocol, which is the
default protocol of the M-7000 series. The
communication Baud Rates for the Modbus RTU protocol
can be in the range of 1200 bps to 115200 bps, and the
parity, data and stop bits are fixed as no parity, 8 data bits
and 1 stop bit.
Modbus functions supported by the module are described
in Chapter 3.
1.13.1 Protocol Switching
To switch to the DCON protocol:
1. Uses sub-function 06h of the function 46h and set byte
8 to a value of 1. See Section 3.6.4 for details.
2. After a power-on reset, the communication protocol
will be changed to DCON.
To switch to the Modbus RTU protocol:
1. Sends the $AAPN command and set N to a value of 1.
Note that for the M-7005, the slide switch on the rear
side of the module should be set to the INIT position,
see the figure on the next page. See Section 2.19 for
details.
2. After a power-on reset, the communication protocol
will be changed to the Modbus RTU protocol.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
26
1.13.2 INIT Mode
When the module is powered on, with the rear slide switch
set to the INIT position as shown in the figure below for
the M-7005, the module is in INIT mode, (see Section A.1
for details), and the communication settings are as follows:
1. Address: 00
2. Baud Rate: 9600 bps
3. No checksum
4. Protocol: DCON
If communication with the module is not possible, set the
module to the INIT mode and use the above settings to
communicate with the module. To read the current
settings, send the commands $AA2, (see Section 2.7), and
$AAP, (see Section 2.18). To set new settings, send the
commands %AANNTTCCFF, (see Section 2.1) and
$AAPN, (see Section 2.19). The new communication
settings will be effective after the next power-on reset.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
27
1.14 Mounting
1.14.1 Din-Rail Mounting
There are three new DIN rail models available. Each is
made of stainless steel, which is stronger than those made
of aluminum. There is a screw at one end and a ring
terminal is included so that it can be easily connected to
the earth ground. The three new DIN rail models are as
follows.
Part number Max. number of modules Dimensions
DRS-360 5 360mm x 35mm
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
28
Part number Max. number of modules Dimensions
DRS-240 3 240mm x 35mm
Part number Max. number of modules Dimensions
DRS-125 2 125mm x 35mm
Note: It is recommended that a 16 – 14 AWG wire is used
to connect the DIN rail to the earth ground.
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
29
1.14.2 Piggyback Mounting
1.14.3 Wall Mounting
i-7005/M-7005 User’s Manual, Rev: B1.8 7MH-018-B18
30
Loading...