GE VersaPoint IC220PBI002 User Manual page 107

Highest Station The highest possible station address for any active station on the network. This affects
how much time is spent soliciting for new Profibus master devices. Default is 126.
Token Rotation The maximum target token rotation time for the network, expressed in t_bits (and
Time milliseconds).
Slot
The amount of time (microseconds) the master waits for a reply to a message.
Idle 1
The amount of time (microseconds) the master waits after it receives a reply or an
acknowledgement.
Idle 2
The amount of time (microseconds) the master waits after sending a message and
before sending another message.
Ready The number of t_bits the master waits before sending an ACK response, after sending
a command.
Quiet The number of t_bits the master waits after it turns on its transmitter, before it begins to
send data.
Token Retry The number of times the master tries to pass the token before deciding that a station is
not there.
Token Error The maximum number of errors in 256 token cycles.
Response Error
The maximum number of message failures in 16 successive messages.
Gap Update The number of token rotations between solicitations for a new Profibus master
Factor
Message Retry The maximum number of times the master tries to send a message when the slot time
expires.
Typical Scan Cycle Times, The estimated time (µs) required for one scan of the PROFIBUS
network (read-only).
Minimum
The minimum I/O scan time in 100 microsecond increments. This may be required if the
I/O modules are restricted in how often they can be scanned. Range is 2 to 65535.
Auto
If this is selected, the maximum I/O scan time and Watchdog timer are assigned
automatically based on the number of slave devices configured.
Maximum
If Auto is not selected, select the maximum I/O scan time in 10 millisecond increments.
If the scan time exceeds this value, the master faults all the slaves, reinitializes them,
and brings them back online. When the maximum I/O scan time is updated, the
Watchdog timer is also updated. Range is 12 to 65535.
Watchdog If Auto is not selected select the watchdog timeout value. If a slave does not receive
any communication from its master within the Watchdog time, the slave generates a
fault, the outputs are set to 0, and the slave is reinitialized by the master. Assigning a
value affects the maximum cycle time.
Repeater
Select this if there are repeaters on the network.
FMS Devices Select this if there are Profibus FMS devices on the network.
Stay Offline on Select this if you want the master to stay offline when the Token Error Limit or response
Error Error Limit is exceeded within 256 token cycles.
GFK-1911B Chapter 7 Configuration
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