turck IO-LINK MASTER, Руководство пользователя

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D301171 - IO-Link master 1108
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System overview
1
The DPM1 sends its local status within a configurable time interval via a multi-master
command to all assigned DP slaves. The system response to an error in the data transfer
phase of the DPM1, e.g. a failure of a DP slave, is determined by the operating parameter
"Auto-Clear". If this parameter is set to "True", then the DPM1 switches all outputs of the
assigned DP slaves to the safe status, as soon as a DP slave is no longer capable of user data
transfer. Then the DPM1 changes to the "Clear" state. If this parameter is set to "False", then
the DPM1 will retain its operating condition also in the event of an error and the user can
determine the system response.
Data transfer between DPM1 and the DP slaves
Data exchange between the DPM1 and the assigned DP slaves is automatically controlled by
the DPM1 in a determined fixed order. During configuration of the bus system, the user
assigns the DP slaves to the DPM1. It is also defined which DP slaves are to be included in
or excluded from cyclic user data transfer.
Data exchange between DPM1 and the DP slaves can be divided into the phases parameter-
ization, configuration and data transfer.
Prior to including a DP slave in the data transfer phase, the DPM1 checks during the param-
eterization and configuration phase, whether the programmed required configuration
complies with the actual device configuration. This check is used to verify that the device
type, the format and length information as well as the number of inputs and outputs accord.
The user thus is securely protected against parameterization errors. Additionally to the user
data transfer, which is automatically effected by the DPM1, it is also possible to send new
parameters to the DP slaves upon request of the user.
Protective mechanisms
In the decentralized periphery it is required to provide the system with highly effective protec-
tive functions against faulty parameterization or failure of the transmission devices.
PROFIBUS-DP applies certain mechanisms to monitor the DP master and the DP slaves.
These can be described as time monitoring functions. The monitoring interval is determined
during system configuration.