M-7026
M-7026 User Manual Rev: 1.5 Date: 2016/03/10
178
4. Troubleshooting
If you are having difficulties using your M-7026 module, here are some
suggestions that may help. If you cannot find the answers you need in this
guide, contact ICP DAS Product Support.
4.1 Communicating with the Module
If you attempt to communicate with the module and receive no response, first
check the following:
Ensure that the supplied power is within the range of +10 to +30 V
DC
. If the
supplied power is sufficient, then the power LED should be on.
When the module receives a command, the power LED will be set to
“OFF”. The power LED will be shown as “ON” after the module responds.
This method can be used to check whether or not the module has
received a command sent from the host.
If possible, use another device that is known to be functional to check
whether the host can communicate with the device through the same
network.
If the host is a PC installed with a Windows operating system, execute the
DCON Utility to determine whether the module can be found. The DCON
Utility can be downloaded from the ICP DAS website at
http://www.icpdas.com. Documentation for the DCON Utility can be found
in the
“Getting Started for I-7000 Series Modules” manual.
Set the module to “INIT mode” and communicate with the module using
address 00 and the DCON protocol. See Section 1.9 for more details
related to configuration settings.
4.2 Reading Data
If the data read from the input channel is not correct, first check the following:
Ensure that the Type Code and data format settings are correct. The Type
Code is set by using the $AA7CiRrr command (see Section 2.18). The
data format is set by using the %AANNTTCCFF command (see Section
2.1). If you are using the Modbus RTU protocol, the Type Code is set by
using sub-function 08h of the 46h function.
If the voltage read by the module is incorrect, it may be because the
calibration parameters stored in the non-volatile memory are corrupted.
You can calibrate the module by yourself, but be sure to read the
information contained in Section 1.8 before performing any calibration.
Use the $AAS1 command (Section 2.35) to reload the factory calibration
parameters.
Summary of Contents for M-7026
Page 8: ...M 7026 User Manual Rev 1 5 Date 2016 03 10 8 1 3 Pin Assignments...
Page 12: ...M 7026 User Manual Rev 1 5 Date 2016 03 10 12 1 5 Block Diagram...
Page 13: ...M 7026 User Manual Rev 1 5 Date 2016 03 10 13 1 6 Application Wiring...
Page 43: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 43 Section 1 8 1 Analog Input Calibration...
Page 47: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 47 Section 5 1 INIT Mode...
Page 90: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 90 Section 5 2 Dual Watchdog Operation...
Page 113: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 113 Section 2 68 AARECi...
Page 127: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 127 Section 2 62 AADODD...
Page 129: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 129 Related Commands Section 2 61 AADI...
Page 141: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 141 Related Commands Section 2 53 AACECi...
Page 180: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 180...
Page 183: ...M 7026 M 7026 User Manual Rev 1 5 Date 2016 03 10 183...
