PLX51-PBM
Operation
PROFIBUS DPV0/DPV1 Master or Slave to EtherNet/IP™ or Modbus® Gateway
User Manual
ProSoft Technology, Inc.
Page 135 of 196
5.2.2
PROFIBUS DP - Slave
The PLX51-PBM in Slave mode will operate similar to when in Master mode, but
each configured Slave will be enabled by setting the correct enable bit in the Device
Control Register. Once the respective bit has been set in the Device Control Register
the PLX51-PBM Slave
will become “alive” on the PROFIBUS network and will start
responding to a PROFIBUS DP Master.
Slave Device Status
The Slave Status is populated in Coil (CS) or Holding (HR) registers starting at the
Status Register
offset
.
Table 5.52
– Modbus Master and Device Status
CS Offset
Description
Master Status
0
Configuration Valid
1
Owned
2
Duplicate DP Station
3
PROFIBUS Fieldbus Error
4
PROFIBUS Device Error
5
PROFIBUS OFFLINE
6
PROFIBUS STOPPED
7
PROFIBUS CLEAR
8
PROFIBUS OPERATIONAL
9
Master/Slave Mode (1 = Slave Mode)
32 - 158
Live List Flags (Station Address 0 - 126)
160 - 286
Data Exchange Flags (Station Address 0 - 126)
288 - 414
Alarm Pending Flags (Station Address 0 - 126)
416 - 542
Diagnostic Pending Flags (Station Address 0 - 126)
Slave Device Status
544 + (16 x [Station Address])
Online
545 + (16 x [Station Address])
Data Exchange Active
546 + (16 x [Station Address])
Ident Mismatch
547 + (16 x [Station Address])
Disabled by Output Assembly
548 + (16 x [Station Address])
Device Error
549 + (16 x [Station Address])
Alarm Pending
550 + (16 x [Station Address])
Diagnostics Pending
551 + (16 x [Station Address])
Output Assembly Station Address Mismatch
552 + (16 x [Station Address])
Mapping CRC Mismatch
553 + (16 x [Station Address])
Slave Clear Op Mode
554 + (16 x [Station Address])
Slave Alarm Ack
The Slave Device Enable and (Alarm) Control is located in Coil (CS) or Holding (HR)
registers starting at the Device Control Register offset.
Table 5.53
– Modbus Slave Device Control
CS Offset
Description
Device Enable
0 + [Station Address]
Device Enable (Station Address 0 - 126)
Device Control
128 + (8 x [Station Address])
DPV1 Alarm Trigger
