AutomationDirect Stride SIO-MB04RTDS User manual

Manual Number: SIO-MB04RTDS-UG
®
Field I/O
SIO-MB04RTDS
USER GUIDE
Temperature Input Module: RTD, 4-channel

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SIO-MB04RTDS User Guide, 1st Edition
GENERAL DESCRIPTION
Modbus data is mapped in tables and assigned an address. Data can be of two types:
• REGISTER, 2 bytes (word of 16 bits) that can be associated to an analog input or output, a variable, a setpoint, etc.
• COIL, 1 bit that can be associated to a digital input or output, or to a logic state.
A register could contain the image (mirror) of a group of coils; for example, the system flags of the device could be read or written
as individual bits addressing the coil related to each or can be read or written as a word addressing the register. Modbus registers and
coils are divided into the following groups of addresses:
• 0xxxx and 1xxxx = Coils (bit)
• 3xxxx and 4xxxx = Registers (word)
When reading functions are performed, use the tables indicated below to address the registers. These registers may be addressed by a
Modbus TCP/IP server or by the integrated web server.
COIL ADDRESSES
Coil (Hex) Coil (Dec) Description Access
0x00A1 00161 Watchdog Enable R/W
0x00A2 00162 Watchdog Event R/W
0x00A3 00163 Power Up Event R/W
REGISTER ADDRESSES
Register Description Access
40002 Firmware [0] RO
40003 Firmware [1] RO
40004 -Reserved- RO
40005 -Reserved- RO
40007 Node ID R/W
40011 System Flags R/W
40013 Watchdog timer R/W
40031 Input Type, Channel 0 R/W
40032 Input Type, Channel 1 R/W
40033 Input Type, Channel 2 R/W
40034 Input Type, Channel 3 R/W
40041 Analog Input (0) - Ch0 RO
40042 Analog Input (1) - Ch1 RO
40043 Analog Input (2) - Ch2 RO
40044 Analog Input (3) - Ch3 RO
40050 Break Status RO
41241 Offset Channel 0 R/W
41242 Offset Channel 1 R/W
41243 Offset Channel 2 R/W
41244 Offset Channel 3 R/W
SUPPORTED MODBUS FUNCTION CODES
Function Description
01 Read Coil Status (0xxxx)
02 Read Inputs Status (1xxxx)
03 Read Holding Registers (4xxxx)
04 Read Inputs Registers (3xxxx)
05 Force Single Coil
06 Preset Single Register
15 (0x0F) Force Multiple Coils
16 (0x10) Preset Multiple Registers
NOTES:
• Registers and coils marked as RO in the column ‘Access’ are Read Only registers.
• Registers and coils marked as R/W in the column ‘Access’ are Read and Write registers.
• The group of 0xxxx addresses mirrors the group of 1xxxx addresses; the group of 3xxxx addresses mirrors the 4xxxx addresses.
Therefore the first register could be addressed either as 30002 (with function 04) or 40002 ( with function 03).
• A maximum of 128 coils can be read through Modbus function codes 01 and 02 (see “Supported modbus functions codes”).
• A maximum of 64 registers can be read through Modbus function codes 03 and 04 (see “Supported modbus functions codes”).
• A maximum of 64 registers can be written by Modbus function code 16 (see “Supported modbus functions codes”).
• A maximum of 64 coils can be written by Modbus function code 15 (see “Supported modbus functions codes”).

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SIO-MB04RTDS User Guide, 1st Edition
PRODUCT LABEL AND WIRING DIAGRAM
Terminal block pinouts and wiring diagrams are printed on the side of the module, as shown below.

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SIO-MB04RTDS User Guide, 1st Edition
DESCRIPTION OF MODBUS REGISTERS
40002 / 40003: FIRMWARE
Two read-only registers, containing the firmware version.
40007: NODE ID
Contains the Modbus address of the device; the values allowed are from 1 to 245 decimal.
This value must match the Modbus address of the connected Modbus device (data source).
Default value: 1 Decimal (01 Hex). INIT value: 245 Decimal (F5 Hex).
40011: SYSTEM FLAGS
Contains the enable bits and system event identifiers. The following parameters are configurable:
Watchdog Event Enable: this bit enables the Watchdog Event (0=Watchdog Disabled, 1 =Watchdog Enabled). If the Watchdog
is enabled and the Watchdog Timer (configured in register 40013) expires before this device receives a Modbus command, the
green PWR LED blinks and the Watchdog Event bit is set to 1. This bit must be set in logic on power up.
Watchdog Event: this bit is set to 1 when the Watchdog Timer expires before this device receives a Modbus command. This bit must
be reset manually after a Watchdog event.
Power Up Event: this bit is forced to 1 at each time power is applied to the device to indicate that the device has been switched off
or reset. With the setting of this bit as 0 (by the user) and checking its state, it is possible to know if a reset of the device has occurred
(0 = reset not occurred; 1 = reset occurred). This bit must be reset manually.
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Coil -----163 162 161 - - - - - - - -
Description Watchdog Event enable
Watchdog Event
Power Up Event
40013: WATCHDOG TIMER
Contains the value of the Watchdog timer, in seconds. If the Watchdog is enabled and the device doesn’t receive a command before
this timer expires, the Watchdog bit will be set to 1 (see the description of “System Flags”). Default value: 10 (10 sec.).
40031: INPUT TYPE CHANNEL 0
This register shows the type of sensor configured for this input (see “Input Type Table”).
Default: Pt100 (0D Hex)
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Description Input Type #0
40032: INPUT TYPE CHANNEL 1
This register shows the type of sensor configured for this input (see “Input Type Table”).
Default: Pt100 (0D Hex)
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Description Input Type #1
INPUT TYPE TABLE
Type Value (Hex)
Disabled 00h
Resistor 0–2000 Ohm 12h
Resistor 0–500 Ohm 0Ch
Pt100 0Dh
Ni100 0Fh
Pt1000 0Eh
Ni1000 10h
Pot. < 50 kOhm 11h

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40033: INPUT TYPE CHANNEL 2
This register shows the type of sensor configured for this input (see “Input Type Table”).
Default: Pt100 (0D Hex)
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Description Input Type #2
40034: INPUT TYPE CHANNEL 3
This register shows the type of sensor configured for this input (see “Input Type Table”).
Default: Pt100 (0D Hex)
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Description Input Type #3
40041: ANALOG INPUT #0 VALUE
40042: ANALOG INPUT #1 VALUE
40043: ANALOG INPUT #2 VALUE
40044: ANALOG INPUT #3 VALUE
These registers return the measurement of each channel, converted to engineering units. The values are stored in the registers as
16-bit signed integers. Values for the RTD and Res 500 Ohm sensor types are stored with one implied decimal place. Values are
stored as integer ohms for Res 2000 ohm sensors, and one decimal place is implied for Potentiometer inputs.
For example:
• Input type set as RTD: 246 stored in the register indicates 24.6°C
• Input type set as Potentiometer: 400 stored in the register indicates 40% of the nominal maximum value of the potentiometer
• Input type set as Res 2000 Ohm: 1256 stored in the register indicates 1256 Ohms
• Input type set as Res 500 Ohm: 1352 stored in the register indicates 135.2 Ohms
NOTE: When INIT mode is active, the analog input measurements are not updated.
40050: BREAK STATUS
When a break condition is detected (e.g., broken sensor, disconnected cable, or over temperature) the bit corresponding to the
channel is set to 1.
Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Input ---------#3 -#2 -#1 -#0
Description Break input #3
Break input #2
Break input #1
Break input #0
41241: OFFSET CHANNEL #0 VALUE
41242: OFFSET CHANNEL #1 VALUE
41243: OFFSET CHANNEL #2 VALUE
41244: OFFSET CHANNEL #3 VALUE
These registers contain the offset values for each input.
The values are expressed in ohms for the Res 2000 ohm input, tenths of ohm for Res 500 ohm input, tenths of % for the
potentiometer input and tenths of °C for the RTD input.
The register format is a 16 bit unsigned integer.
INPUT TYPE TABLE
Type Value (Hex)
Disabled 00h
Resistor 0–2000 Ohm 12h
Resistor 0–500 Ohm 0Ch
Pt100 0Dh
Ni100 0Fh
Pt1000 0Eh
Ni1000 10h
Pot. < 50 kOhm 11h

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SIO-MB04RTDS User Guide, 1st Edition
WEB SERVER STRUCTURE
Login Screen
To access the server, open the web browser and enter the IP address of the device. Our examples use Chrome screen captures.
Browsers may differ slightly.
Enter the Username and Password.
• Default username: admin
• Default password: password
Click Login to access the device as follows. Note that all pages include a Logout button to quit and return to the login page.
The device interface includes five configuration categories, as shown by the navigation menu on the left of the screen on the next
page. Hovering over a navigation button will display a tooltip to describe the selection.

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Network Settings
On the Network Settings page, set the Ethernet communication parameters.
• IP Address: set the IP address of the device.
• Subnet Mask: set the subnet mask to match the local network.
• Gateway Mask: set the default gateway. A default gateway allows this device to communicate with devices on another subnet.
• Socket Timeout: set the timeout time in minutes; the device will close its TCP connection if it does not receive a command within
this time period.
Click Save to apply and store the modified parameters. Wait for the device to reset. After modifying the network settings you will
need to use the updated IP address to connect to the device, and may need to change the subnet mask on your PC.

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System Configuration
On the System Configuration page, set the basic system parameters.
• Name: set a helpful name to identify this device; max 15 alphanumeric characters.
• Modbus Address: set the Modbus address of this device; the default value is 1. In INIT mode this value is temporarily set to 245.
• Watchdog Enable (ref. “System Flags” register): enables the Watchdog event (0 = Watchdog disabled, 1 = Watchdog enabled).
• Timeout (ref. “Watchdog timer” register): set the value in seconds of the Watchdog timer.
• Watchdog Event (ref. “System Flags” register): this flag signals that the Watchdog condition has occurred
(0 = Normal condition; 1 = Alarm condition).
• Power-up Event (ref. “System Flags” register): this flag is forced to 1 at each power-on and indicates that the device has been
switched off or a power cycle has occurred. (0 = power cycle has not occurred ; 1 = power cycle has occurred ).
Click Save to apply and store the modified parameters. To read the parameters from the device click Refresh.

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Software Update
When a software upgrade is required, click Upgrade.
• Upgrade: opens a dialog to enter credentials, select a file from the local PC and proceed with the update.
• Firmware Version: shows the firmware version loaded on the device.
• WebPage Version: shows the version of the web-based user interface loaded on the device.
Do not disconnect power from the device during the upgrade process.

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Username and Password
Set the user name and password.
• Username: set the user name to access the device. Default “admin”.
• Password: set the password to access the device. Default “password”.
Click Save to apply and store the modified parameters.

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Analog Input
This page displays the values of the analog inputs in the unit of measurement defined by the “Input Type”. Each input is electrically
isolated from all others and can be configured independently.
• Read: retrieves current value and break status from the device for all channels.
• Input Type (ref. “Input Type” registers): sets the desired type of sensor connected to the input. A channel can be disabled by
selecting “Disabled” as its input type.
• Value (ref. “Analog Input” registers): shows the current value of each analog input.
• Break (ref. “Break” register): indicates the connectivity status of the sensor. If a sensor is disconnected, a wire is broken or the
sensor is over temperature, a red indicator is shown under the break column at that channel.
• Offset: sets an offset value to be added to the raw sensor reading to calibrate the sensor.
• Set Same Input: sets all channels to the input type selected for the first channel (Analog In 0).
Click Save to apply and save all changes on the page.

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SIO-MB04RTDS User Guide, 1st Edition
INIT, RESET AND WATCHDOG FUNCTIONS
INIT Function
The INIT function facilitates access to a device when there is a problem accessing it at its configured IP address. The configured
username and password are required for INIT access.
The INIT terminal is adjacent to the power terminals. Applying power to the device while the INIT terminal is shorted to the -VS
terminal causes the device to request a temporary IP address from the DHCP server on the network. If there is no DHCP server on
the network, the device will temporarily use 192.168.1.174.
The temporary INIT mode Modbus ID is 245.
Once connected in INIT mode, device network parameters (IP address, subnet mask, etc.) may be changed to conform to the
requirements for your industrial network. Other parameters may also be modified while INIT mode is active. Once the short (or
jumper) is removed from the INIT and -VS terminals, the device can be accessed using the user-configured IP address, username, and
password.
NOTE: If not using DHCP, verify that 192.168.1.174 is not in use on your network and ensure that the 192.168.1.n network is
accessible to your computer.
To use the INIT function:
• Before applying power to the device, short the INIT terminal to the -VS terminal.
• Apply power to the device and connect the RJ45 Ethernet port to your computer.
• Open a browser and type 192.168.1.174 or the DHCP-assigned address in the address field.
• Browse through the user interface to view configuration settings and data, or change configuration settings.
• When all changes are complete and saved, disconnect power from the device.
• Remove the connection shorting the INIT and -VS terminals.
• Apply power to the device and access it from a browser using the configured IP address, user name and password.
NOTE: When INIT mode is active, the analog input measurements are not updated.
Hardware Reset to Default
With the device powered and not in INIT mode, push and hold the RESET button located on the front of the device for 5 seconds.
The green PWR LED will switch off, the yellow STS LED will turn orange and the device will reset.
When the reset procedure is finished, both LEDs will be in the default condition and the following parameters will be set:
• IP Address: 192.168.1.100
• Subnet Mask: 255.255.255.0
• Default Gateway: 192.168.1.1
• Modbus Address: 1
• Username: admin
• Password: password
Watchdog Function
The device is equipped with a Watchdog timer. If enabled, it activates an alarm each time that there is not communication between
the device and the master for a time greater than that specified.
During this alarm condition the green PWR LED on the front of the device blinks and the “Watchdog Event” coil is forced to 1.
To exit from the alarm condition, send any command to the device and reset the “Watchdog Event” coil.
NOTE: When the device is switched off the state of the “Watchdog Enable” bit remains stored in EEPROM.