Function List - Mitsubishi Electric Melsec Q Series User Manual

3
SPECIFICATIONS

3.2 Function List

The following table summarizes a list of QJ71PB92V functions.
Function
PROFIBUS-DPV0
I/O data exchange
Acquisition of
diagnostic and
extended diagnostic
information
Global control function
PROFIBUS-DPV1
Acyclic communication
with DP-Slaves
Alarm acquisition
PROFIBUS-DPV2
Time control over DP-
Slaves
Data swap function
Data consistency function
Output status setting for the
case of a CPU stop error
Temporary slave
reservation function
Redundant system support
function
QJ71PB92D-compatible
function
3
- 3 3.2 Function List
Table3.3 Function List
Up to 125 DP-Slaves can be connected to a single QJ71PB92V, enabling the I/O data
exchange of max. 8192 bytes.
Note that when QJ71PB92Vs are mounted on main base units in a redundant system,
up to 124 DP-Slaves can be connected.
Diagnostic or extended diagnostic information of an error occurred on a DP-Slaves
during I/O data exchange can be easily acquired using the buffer memory and I/O
signals.
By sending services (SYNC, UNSYNC, FREEZE, UNFREEZE) to each DP-Slave in a
group, synchronous control of DP-Slave I/O data is available.
This function allows data reading/writing to DP-Slaves at any specific timing
independently of I/O data exchange.
This function enables acquisition of up to 8 alarms or status information data that have
been generated on any DP-Slave.
This function allows the QJ71PB92V to operate as the time master and set the time of
each DP-Slave.
This function swaps the upper and lower bytes in word units when I/O data is sent and
received.
When I/O data from DP-Slaves are read from or written to the buffer memory, this
function prevents the I/O data from being separated and incorrectly mixed.
• Automatic refresh setting (GX Configurator-DP)
• Dedicated instructions (BBLKRD and BBLKWR instructions)
This function sets whether to stop or continue I/O data exchange with DP-Slaves when a
CPU stop error occurs on a QCPU or remote I/O station where the QJ71PB92V is
mounted.
When the QJ71PB92V is mounted to a redundant system, I/O data exchange with DP-
Slaves is continued regardless of the setting until systems A and B go down.
Without modifying the slave parameter in GX Configurator-DP, this function allows the
DP-Slave type to be changed to "Reserved station" temporarily.
When the control system CPU or the QJ71PB92V detects an error, the control and
standby systems are switched each other to continue communications.
This function is used to replace the QJ71PB92D with the QJ71PB92V.
When the QJ71PB92D has failed, replace it with the QJ71PB92V using the
QJ71PB92D-compatible function.
Description
Reference
Section
Section 4.1.1
Section 4.1.2
Section 4.1.3
Section 4.2.1
Section 4.2.2
Section 4.3.1
Section 4.4
Section 4.5
Section 4.6
Section 4.7
Section 4.8
Section 4.9