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AMT58x-PB Profibus®
Types of communication messages
Transmission of data between Master and Slave is carried out using
the following types of messages:
DDLM_Set_Prm:
Used for configuring the Slave. This communication mode is active
immediately after power is turned ON and is used to send
parameters from the Master to the Slave (see the section "6.4
DDLM_Set_Prm" on page 31).
DDLM_Chk_Cfg:
It sets the number of bytes used for data transmission in
Data_Exchange
37).
DDLM_Data_Exchange:
This is the "standard operation mode".
It is used either by the Master to send the
Slave to transmit the
DDLM_Data_Exchange" on page 38).
DDLM_Slave_Diag:
It is used when the power is turned on and whenever the Master
needs to know diagnostic information from the Slave device (see
the section "6.7 DDLM_Slave_Diag" on page 40).
30
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mode (see section "6.5 DDLM_Chk_Cfg" on page
Position
value (see the section "6.6
Preset
value and by the
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