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FX2N-32DP-IF Profibus-DP Interface Unit Advanced Devices 4
4-7
Note 3: Communication status
This device is the 32DP-IF’s communication status. According to the status of 32DP-IF the
bits are set and reset as follows.
*1 Clear data global control: When this command is received, the 32DP-IF set to “0” the output
data (D100 ~ D199) of extension units/blocks connected it.
*2 Unfreeze global control: The UNFREEZE control command stops freeze control mode. The
input data (D0 ~ D99) of extension units/blocks connected to the
32DP-IF is immediately sent to the DP-master.
*3 Freeze global control: The DP-master sends a FREEZE control command to a group of DP-
slaves to hold their current input status. The input data (D0 ~ D99) of
extension units/blocks connected to the 32DP-IF are withheld until
the next FREEZE/UNFREEZE control command is received.
*4 Unsync global control: The UNSYNC command stops SYNC control mode. The output data
(D100 ~ D199) send from the DP-master is immediately transmitted
to extension units/blocks connected to the 32DP-IF.
*5 Sync global control: The DP-master sends a SYNC control command to a group of DP-
slaves to synchronize their current output states. The output data
(D100 ~ D199) of extension units/blocks connected to the 32DP-IF
remains constant until the next SYNC/UNSYNC command is
received.
Table 4.8: Communication Status in D8025
Bit No. Description 1 (ON) 0 (OFF)
Bit 0 Module on-line/off-line Module on-line Module off-line
Bit 1 Reserved
BIt 2 Diagnosis flag
New diagnosis not yet fetched by
DP-master
New diagnosis fetched by
DP-master
Bit 3 Reserved
Bit 4, 5 DP-status
(bit 5, 4) = (0, 0) Wait parameter state
(bit 5, 4) = (0, 1) Wait configuration state
(bit 5, 4) = (1, 0) Data exchange state
(bit 5, 4) = (1, 1) Not possible
Bit 6, 7 DP-watchdog state
(bit 7, 6) = (0, 0) Baud search state
(bit 7, 6) = (0, 1) Baud control state
(bit 7, 6) = (1, 0) DP search state
(bit 7, 6) = (1, 1) Not possible
Bit 8 Reserved
BIt 9
Clear data global control
*1
Clear data command received No clear data command received
Bit 10
Unfreeze global control
*2
Unfreeze command received No unfreeze command received
Bit 11
Freeze global control
*3
Freeze command received No freeze command received
Bit 12
Unsync global control
*4
Unsync command received No unsync command received
Bit 13
Sync global control
*5
Sync command received No sync command received
Bit 14, 15 Reserved