Figure 29: Timeout Configuration

ICC

10.7.4 Timeout Configuration

The interface can be configured to perform a specific set of actions when network communications are lost. Support for this feature varies depending on the protocol: refer to the protocol-specific section of this manual for further information.

There are two separate elements that comprise the timeout configuration (refer to Figure 29):

•The timeout time

•The timeout configuration array

The timeout time is a floating-point number which allows adjustment

down to 1/100th of a second (0.01 second increments). This time setting is used by certain protocols in order to determine abnormal loss-of- communications conditions and, optionally, to trigger a timeout processing event. The default timeout time is 10s.

The timeout configuration array allows up to 10 register/value pairs to be designated by the user. When a timeout event is triggered by a protocol, the timeout configuration array indexes are parsed. If the “register” field for an index is set to 0, then this index is “disabled” and therefore ignored. If, on the other hand, the “register” field is non-zero, then the value contained in the “value” field is automatically written to the designated register. This flexible mechanism allows up to 10 designated drive registers to have their own unique “fail-safe” conditions in the event of a network interruption.

For example, Figure 29 shows a timeout time of 10s, and one timeout entry assignment. If a protocol that makes use of timeout processing triggers a timeout event, then a value of 5000 will automatically be written to drive register 1008 (the frequency command). Provided the drive has a valid “run” command and is currently configured to use the network frequency command as its master frequency command, it will ramp to 50.00Hz.

If timeout/failsafe processing is not desired, just set the “register” fields for all indexes to 0 (disabled). This is the default condition.

“DEC” and “HEX” selection buttons are also available, and allow changing the “value” column data display and entry radix between decimal and hexadecimal formats, respectively. These buttons provide the ability to interact with the various drive registers in their most natural radix (e.g. a hexadecimal command word vs. a decimal frequency command value).

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