bonitron M3452, Customer Reference Manual

Page: 34 / 80

M3452 vR7 EIP/PDP
34
than the switches. The internal EEPROM setting is modified via the
Set Slave Address command. Powering up with switches set to 255
(FFh) will cause the internal EEPROM setting to revert back to 126
(7Eh), which may be used to re-commission the module. If both the
internal EEPROM address and the switches are set to 126 upon
power-up (this is the initial state from the factory), the module will
await the Set Slave Address command before completing
initialization and assuming the data exchange mode.
IMPORTANT!
(Address Setting)
:
The internal EEPROM address setting and
external switch setting is 126 from the factory. As such, the
module will await the Set Slave Address command following
power-up and will not proceed to exchange data, unless the
external switches are instead set to an address from 0-125, or the
internal setting is changed to an address from 0-125 via the Set
Slave Address command.
PROFIBUS Character: 11 bits (1 start bit + 8 data bits + 1 even
parity bit + 1 stop bit). Applies to all bytes, including frame bytes.
Bus Idle State:
“1” (a start bit causes line to go to “0”). An idle state
of at least 33 Tbits (sync-time) must be provided between
messages.
•
Note: 1Tbit at 12Mbaud = 1/12000000bit/sec = 83nsec.
Ident_Number: 06F3 Hex (981PB-2012), 06F2 Hex (982PB-2012),
06F1 Hex (983PB-2012).
GSD File: ACRO06F1.GSD (983PB-2012).
Network Capacity: Multi-drop up to 31 modules, plus a host,
without a repeater. Up to 125 modules plus a host if four repeaters
are used (one for every 31 nodes).
4.2.4.4.2. LED I
NDICATORS
Run (Green) - Constant ON if power is on and unit is OK. Flashing
ON/OFF indicates unit is performing diagnostics (first few seconds
after power-up), or has failed diagnostics (after a few seconds).
Bus (Yellow)
–
ON indicates unit has completed its initialization
sequence and is in the data exchange mode on the network.
Output (Yellow, One Per Output)
–
ON if output relay is ON
(closed).
4.2.4.4.3. N
ETWORK
C
ABLING
The network connection is a 9-pin D-Sub connector (female) with
metal housing and 4-40 jack screw support. Pin out is detailed
below.