DF1 Protocol Mode
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Doc.Id. SCM-1200-093
Anybus Communicator for Modbus Plus
Doc.Rev. 3.01
9.2 ABC Parameters
(Select ‘ABC’ in the Navigation Section to gain access to the parameters
described in this section).
Interface
Currently, only serial communication is supported.
Status / Control Word
(See “Control and Status Registers” on page 67).
Module Reset
This parameter specifies how the gateway will behave in the event of a fatal error.
Protocol Mode
This parameter specifies which protocol mode to use for the subnetwork.
See also “Protocol Modes” on page 17.
Statistics
The Transmit- and Receive Counters indicate how many transactions that have successfully been ex-
changed on the subnetwork. This feature is primarily intended for debugging purposes.
• Receive Counter Location
Specifies the location of the Receive Counter in the internal memory buffer.
• Transmit Counter Location
Specifies the location of the Transmit Counter in the internal memory buffer.
Both counters are enabled by setting ‘Statistics’ to ‘Enabled’.
Value
Description
Enabled
Enable the Control and Status Registers. The ‘Data Valid’-bit in the Control Register must
be set to start the subnetwork communication.
Enabled but no startup lock This setting is similar to ‘Enabled’, except that the control system is not required to set the
‘Data Valid’-bit to start the subnetwork communication.
Disabled
This setting completely disables the Control and Status Registers.
Value
Description
Enabled
The gateway will be restarted, and no error will be indicated to the user.
Disabled
The gateway will halt and indicate an error.
Value
Description
DF1
This mode is intended for the DF1 protocol. The Anybus Communicator can only be con-
figured as a Master with half-duplex communication.
Note:
This is the only mode available if you intend to configure an ABC module for DF1.
Summary of Contents for Communicator Modbus plus
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