Compoway-F Parameter Settings; Free Communication Blocks - Omron PROFIBUS DP GATEWAY Operation Manual

Compoway-F Communication
3-3-3

Compoway-F Parameter Settings

PROFIBUS
Communication Fails
3-3-4

Free Communication Blocks

44
For the Fixed Communication blocks the user can define behaviour of the
PRT1-SCU11 on the Compoway-F communication in case the PROFIBUS
communication fails.
In case the PROFIBUS communication fails, there are two options for the
PRT1-SCU11 to handle this, as defined by the a user.
• The PRT1-SCU11 can send a stop command to one or more of the
devices, causing the control cycle to stop.
• The Temperature Controller can Hold the last received Setpoint Value.
This behavior can be selected in CX-Profibus when configuring the PROFI-
BUS DP Master unit, see the example in the figure below.
This setting can be defined for every individual Temperature Controller and
will be sent to the PRT1-SCU11 as part of the PROFIBUS DP Set_Prm mes-
sage.
With Free Communication blocks it is possible to read data, write data or send
an operation instruction directly from or to any parameter in a Compoway-F
device. With Free Communication blocks, however, the commands have to be
assembled by the PROFIBUS Master system. The user also has to provide a
simple handshaking mechanism to prevent too many commands being sent.
The PRT1-SCU11 uses the contents of the Free Communication block to
assemble a Compoway-F mini-FINS command, which is sent to the device.
The Free Communications blocks can be selected as I/O modules from the
GSD file. Three Free Communication blocks are defined for Compoway-F and
can be used to configure the PRT1-SCU11.
1. Read for reading one parameter defined in the device.
2. Write for writing one parameter defined in the device.
3. Operation for executing any operation defined in device.
Note The Free Communication blocks do not require the user to make parameter
settings.
Section 3-3