HMS Networks Anybus Communicator User Manual page 67

Communicator Configuration
5. Configure the Transaction settings.
Setting
Transaction
name
Read quantity
Address
Write quantity
Quantity
Constant
Data
Variable data
Update mode
Update time
Positive ack
Negative ack
6. To apply the settings, click Apply in the web-interface header, and follow the instructions..
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Anybus Communicator User Manual
Value Description
You can name the transaction to make it easier to identify.
N/A
1 to 125 Specifies the number of registers to read in the read data field.
Appear when Modbus transaction Read Write Multiple Registers (23)
is selected.
0 to 65 535
Specify the start address for the read/write transaction.
The address acts as an address to the data position, where the data
is read from or written to.
Modbus holding register addresses starts at 0.
Modbus address 0 = Register 1
Read Write Multiple Specifies the quantity of registers/coils to write in the write data
Registers (23)
field.
1 to 123 Appear when Modbus transaction Read Write Multiple Registers (23)
is selected.
Read Holding Registers The Quantity parameter appear when you select a Modbus
(3) transaction that can address more than one data object.
Read Input Registers (4)
Example when Quantity is set: For the Modbus Transaction Read
1 to 125
Input Registers (4) you need to set the Quantity in order to define
the array of data.
Write Multiple Coils (15)
1 to 1968
Example when no Quantity is set: For the Modbus Transaction Write
Single Coil (5) you do not need to set the Quantity parameter
Write Multiple Registers
because there can not be an array of data. The transaction is used to
(16)
write a single output to either ON or OFF in a remote device.
1 to 123
For Write Single Coil (5), Write Single Register (6) and Mask Write
Read Coils (1)
Register (22) Quantity cannot be set.
Read Discrete Inputs (2)
1 to 2000
0 to 255
The value of the Constant in the frame.
0 to 512
The length of the data field.
0 to 255 The maximum payload length of the variable data field.
Cyclically Specify when a transaction shall be sent to the server.
On data change The transaction is issued cyclically, at the interval specified in the
Update time parameter.
Single shot
Change of state on
Cyclically: The transaction is sent cyclically, at the interval specified in
trigger
the Update time parameter.
On data change: The transaction is sent when the data is changed.
Single shot: The transaction is issued once at start up.
Change of state on trigger: The transaction is triggered when the
content of a specified byte changes. In the I/O data map, the node
will be marked with a flash icon.In the I/O data map you can also
configure the area map and the trigger byte address. Refer to
Trigger Byte, p.
3 ms to 60 000 ms Update mode parameter must be set to Cyclically. The Update time
parameter appear when Cyclically is select.
Specify how often, in steps of 10 ms, the transaction are going to be
issued.
When Positive Acknowledgement is enabled, the positive ack data
N/A
byte in the I/O data map is incremented each time this transaction
succeeds.
N/A When Negative Acknowledgement is enabled, the negative ack data
byte in the I/O data map is incremented each time this transaction
fails.
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