PLX51-PBM
Setup
PROFIBUS DPV0/DPV1 Master or Slave to EtherNet/IP™ or Modbus® Gateway
User Manual
ProSoft Technology, Inc.
Page 32 of 196
Setup Time (TSET)
Setup Time (in tbits) is the reaction time on an event. Calculation of TSET
must respect the rule:
Min: 1
Max: 494
PROFIBUS Cycle
PROFIBUS Cycle (in ms) (read/Write) field defines the cyclic time the master
will respect between two IO Data Exchange sequences. This parameter can
be increased by the user when the PROFIBUS network load does not allow
the processing of acyclic requests.
Auto Recommend
When Enabled, all timing parameters will be updated with recommended
calculations when the Ok or Apply button is pressed.
IMPORTANT: When the user changes the BAUD Rate, all PROFIBUS timing parameters will
be updated irrespective of the Auto Recommend check-box selection.
Default Watchdog
(Read-Only)
Default Devices Watchdog (in ms) value defines the watchdog value assigned
by default to all devices in the configuration.
Min TSDR
(Read-Only)
Smallest Station (in tbits) is the minimum time that a PROFIBUS DP slave
must wait before it may answer. It must respect the rule:
TQUI < MIN_TSDR
Min: 11
Max: 1023
Max TSDR
(Read-Only)
Largest Station (in tbits) is the maximum time that a PROFIBUS DP slave may
take in order to answer. Calculation of MAX_TSDR must respect the rule:
Min: 37
Max: 65525
Idle Time 1 (Tid1)
(Read-Only)
Time Idle1 (in tbits) is the time between the acknowledgement frame or token
frame reception and the transmission of the next frame.
Tid1 = Max(Tsyn+Tsm, MIN_TSDR)
with
Tsyn= 33
Tsm= 2 + 2* TSET + TQUI
Idle Time 2 (Tid2)
(Read-Only)
Time Idel2 (in tbits) is the time between the transmission of an unconfirmed
packet and the transmission of the next packet.
Tid2 = Max (Tsyn+Tsm, MAX_TSDR)
with
Tsyn= 33
Tsm= 2 + 2* TSET + TQUI
IMPORTANT: When the user changes the BAUD Rate all the PROFIBUS timing parameters will
change to the default values for that specific BAUD Rate.
