Modbus/TCP
Operating Manual Communication interfaces
1002971EN03
59
6.4.7
LEDs
The table below describes the Modbus/TCP data areas that contain the LED statuses.
Relevant areas for the data are defined in the Modbus/TCP data areas Discrete Inputs (1x)
and Input Register (3x). Read access is available to these data areas.
Register
(3x)
Discrete Input
(1x)
Content
High Byte
Low Byte
511
8176
Status of LEDs
Reserved
PNOZmulti 2
LEDs
}
Bit 0 = 1: LED OFAULT is lit or flashes
}
Bit 1 = 1: LED IFAULT is lit or flashes
}
Bit 2 = 1: LED FAULT is lit or flashes
}
Bit 3 = 1: LED DIAG is lit or flashes
}
Bit 4 = 1: LED RUN is lit
}
Bit 57: Reserved
6.4.8
Updating the data areas
Data is updated with varying priority.
The table below shows the typical update cycles for the various data.
Content
Typ. update cycle
Virtual inputs/outputs
20 ms
Project and device data
Once during initialisation
State of the inputs/outputs from the base unit and expan
sion modules
320 ms
LED status
1000 ms
Number of elements that can store a state
Once during initialisation
Element enable
320 ms
Diagnostic words
1000 ms
Current state of the virtual inputs
1000 ms
INFORMATION
The update time may increase if there are additional TCP/IP connections
(e.g. PNOZmulti Configurator, PMI, control system) on the PG port (Port
9000).
