Shared Device Applications
TR-Electronic GmbH 2018, All Rights Reserved
Printed in the Federal Republic of Germany
Page 160 of 167
TR - ELA - BA - DGB - 0027 - 03
11/12/2019
8 Shared Device Applications
8.1 Function
Several IO controllers are often used in larger or widely distributed systems. Without the "Shared
Device function", each peripheral module of an IO device (measuring system) would be assigned to
the same IO controller. Where physically close measuring systems have to provide data to different IO
controllers, several measuring systems would therefore be required.
Via the Shared Device function integrated into the measuring system, it is now possible to configure
two submodules under the
PNO Encoder Profile
module or
TR Encoder Profile
module
and to share these between two different IO controllers. Each submodule of the measuring system is
assigned exclusively to one IO controller.
8.2 Configuration information
For Shared Device applications the submodule
Position 32 Bit
must be configured in Subslot 3
in addition to the submodule
Standard Telegram 8x
in Subslot 2 under the module
PNO
Encoder Profile
.
If the module
TR Encoder Profile
is used, in addition to the submodule
Pos. + Vel. 1 - xx
in Subslot 2 the submodule
Shared Device Pos. + Vel. 1 - 30
must be configured in Subslot
3.
Both additional submodules intended for Shared Device applications have only input data and not
output data.
The I/O address allocation for the submodules assigned to the IO controller can be carried out as
usual. The measuring system must have the same IP parameter, the same device name and the
same configuration in each station. Inconsistencies in the configuration will lead to failure of the
measuring system. Only one IO controller may have full access to a submodule at any time. The
second IO controller may not access the same submodule. In this case no data exchange takes place
with the submodule, no alarms can be received and the submodule can also not be parameterized.
8.3 Structure of the cyclic process data
8.3.1 Module: PNO Encoder Profile, Submod.: Position 32 Bit
Structure of input words 1 to 4, IO device -> Master
IW 1
IW 2
IW 3
IW 4
ZSW2_ENC G1_ZSW
G1_XIST1
Signal nos. 10 (
G1_ZSW
), 11 (
G1_XIST1
) and 81 (
ZSW2_ENC
) already used in standard telegrams 81
to 84 are simply copied in the submodule
Position 32 Bit
and are thus also simultaneously
available to the second IO controller as input data. The exact procedure is described from
chapter 6.3.1 page 109.
