Features - Mitsubishi Electric Melsec Q Series User Manual

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OVERVIEW

1.1 Features

The following describes the features of the QJ71PB92V.
(1) DP-Master (Class 1) on PROFIBUS-DP
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- 3 1.1 Features
The QJ71PB92V complies with IEC 61158, and operates as a DP-Master (Class 1) on
PROFIBUS-DP systems.
(a) Up to 125 DP-Slaves are connectable
Up to 125 DP-Slaves
exchange of I/O data up to 8192 bytes. (
* 1 Up to 124 DP-Slaves when QJ71PB92Vs are mounted on main base units in a redundant system
(b) Diagnostic information can be easily acquired
Diagnostic or extended diagnostic information of an error occurred on a DP-Slave
during I/O data exchange can be easily acquired using the buffer memory and I/O
signals. ( Section 4.1.2)
(c) Supporting the global control function
By sending services (SYNC, UNSYNC, FREEZE, UNFREEZE) to each DP-Slave
in a group, synchronous control of DP-Slave I/O data is available. (
4.1.3)
Service Name
SYNC
UNSYNC
FREEZE
UNFREEZE
(d) Supporting PROFIBUS-DPV1 and PROFIBUS-DPV2
PROFIBUS-DPV1 and PROFIBUS-DPV2, which are extended versions of
PROFIBUS-DP, are supported
The QJ71PB92V supports the following:
1) PROFIBUS-DPV1
• Acyclic communication with DP-Slaves (
• Alarm acquisition (
2) PROFIBUS-DPV2
• Time control function on DP-Slaves (
*1
can be connected to a single QJ71PB92V, enabling
Table1.1 Descriptions of Services
This service is for synchronizing the output status of DP-Slaves.
In the SYNC mode, the output status of a DP-Slave is refreshed
each time it receives the SYNC service.
While no SYNC service is received, the output status is held.
This service is for ending the SYNC mode.
This service is for synchronizing the input status of DP-Slaves.
In the FREEZE mode, the input status of a DP-Slave is refreshed
each time it receives the FREEZE service.
While no FREEZE service is received, the input status is held.
This service is for ending the FREEZE service.
Section 4.2.2)
Section 4.1.1)
Description
Section 4.2.1)
Section 4.3.1)
Section