Endress+Hauser Fieldgate FXA720, Руководство по эксплуатации

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Fieldgate FXA720 6 Configuring the Web Server
Hauser 39
Communication
parameters
Table 6-9: PROFIBUS communication parameters
Parameter Description
Master Class
Fieldgate master class = Type 2
Channel ID
Channel identification (user parameter, not required by PROFIBUS application)
Station Address
Fieldgate PROFIBUS DP address (Master Class 2), 0 – 126, default values are 3, 4 and 5.
If two or more channels are connected to the same network, enter different addresses.
Highest Station
Address
Determines the address range to be scanned for token passing.
• Enter highest PROFIBUS master address to be found on the network connected to the channel.
• If two channels or more channels are connected to the same network, then all connected
masters must be considered.
Bus Settings
Baudrate
Can be set separately for each channel - the other communication parameters change to the
factory defaults for the selected baudrate if the "Set factory default" box is checked
.
For more information on individual settings see Appendix 12.3
All the PROFIBUS DP devices, including couplers and links, connected to a particular
channel must have the same communication settings
Communication Settings
Slot Time
Monitoring time – 'Wait for receipt' – of the senders (Requestor) of telegram for the
acknowledgement of the recipient (Responder). After expiration, a retry occurs in accordance
with the value of 'Max. telegram retries'.
Min. Station Delay
Response Time
Shortest time period that must elapse before a remote recipient (Responder) may send an
acknowledgement of a received query telegram.
The shortest time period between receipt of the last Bit of a telegram to the sending of the first Bit
of a following telegram.
Max. Station Delay
Response Time
Longest time period that must elapse before a Sender (Requestor) may send a further query
telegram.
Greatest time period between receipt of the last Bit of a telegram to the sending of the first Bit of
a following telegram.
The Sender (Requestor, Master) must wait at least for this time period after the sending of an
unacknowledged telegram (e.g. Broadcast only) before a new telegram is sent.
Quiet Time
Time delay that occurs for modulators (Modulator-trip time) and Repeaters (Repeater-switch
time) for the change over from sending to receiving.
Setup Time
Minimum period "reaction time" between the receipt of an acknowledgement to the sending of a
new query telegram (Reaction) by the Sender (Requestor).
Token Rotation
Time
Pre-set nominal Token cycling time within which the Sender authorization (Token) will cycle
around the ring. How much time the Master still has available for sending data telegrams to the
Slaves is dependent on the difference between the nominal and the actual token cycling time.
Gap Update factor
Factor for determining after how many Token cycles an added participant is accepted into the
Token ring. After expiry of the time period G*TTR, the Station searches to see whether a further
participant wishes to be accepted into the logical ring.
Max Retries Limit
Number of times the Fieldgate will try to establish communication with a device before it flags it
as faulty
Repeat Channel 1
settings..
A tick causes the channel 1 settings to be loaded into the other channels
Use Default
Communication
Settings for
Selected Baudrate
A tick causes the factory default settings for the selected baudrate to be loaded
If the box is not ticked, the values entered in the appropriate fields are used