Control Techniques Epsilon EP-P Reference Manual page 186

Stop Bits
MbMaster.CommPort.StopBits
When the device's serial port is operating as a modbus master (either MbMaster.CommPort.EnableMbGateway or
MbMaster.CommPort.EnableMbMaster is enabled) this parameter value sets the data stop bits for the port.
Operating as a modbus slave (for HMI or PowerTools connectivity), the data stop bits defaults to 2.
Transmission Counts
MbMaster.CommPort.TransCount
Number of transmissions requested. (writable so it can be zeroed).
Transmission Time
MbMaster.CommPort.TransTime
The duration of the last transmission from request to receive.
ErrorAllSlavesCount
MbMaster.ErrorAllSlavesCount
Indicates the number of communication errors for ALL slaves.
Error Slave Count
MbMaster.#.ErrorSlaveCount
Indicates the number of failed attempts to communicate with the slave device. This parameter can be cleared by setting it to zero in a user
program.
Error Slave Detected
MbMaster.#.ErrorSlaveDetected
Indicates weather the last transmission to the slave failed.
Error Status
MbMaster.#.ErrorStatus
The status of the last command processed by the specified slave. The slave status is updated as follows:
• Cleared at start of the command
• At end of command it is set non-zero if there was any errors
• Errors less than 100 are Modbus exception responses .
Error Status Number
Errors greater than 100 are internal errors whose meaning may vary with each firmware revision.
Modbus ID
MbMaster.#.ID
The Modbus slaves Modbus ID number.
Message Gap
MbMaster.#.MsgGap
This parameter defines the minimum amount of time to wait following a slave response before sending a new query to a different slave. See d
in Figure 121 Modbus RTU Timing Diagram on page 108.
If the value of MbMaster.CommPort.MsgGap is larger, then its value will take precedence.
172
01 Illegal Function
02 Illegal Data Address
03 Illegal Data Value
Slave Device
04
Failure
05 Acknowledge
06 Busy
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Error Description
The slave does not support the request
The data address is not supported by the slave
The value (range) is not supported by the slave
An unrecoverable error occurred while the slave was a
attempting to perform the request
The slave accepted the request but expects a
The slave is busy processing a previous request
Epsilon EP-P Drive Reference Manual
Revision: A4