User manual

Reference PTQ-LNG ♦ Quantum / Unity Platform
Landis & Gyr Telegyr Interface Module
ProSoft Technology, Inc. Page 89 of 103
May 29, 2007
Command Command Description
ADC Reference Force Report - 5
This command returns hardcoded values to the host for one
ADC point. The following values are returned for the -90%,
0% and 90% respectively, 205, 2048, and 3890.
Indication Change Report - 6
This command returns the status and memory bit values for
the indication points that have had a change since the last
host request. This data is derived from the data placed in the
module when the indication point section of the ControlLogix
processor is read. The actual logic to set and clear the
indication bits must be performed by the ladder logic.
Indication point data must be written to the ControlLogix
when the ladder program detects an indication change.
The data block in the ControlLogix processor is read in
segments controlled by an internal block counter. The
module will cycle through the block reading the entire data
area. The indication point section of the database is read
each time in addition to the normal data block. The indication
block is tested for changes immediately after being read.
When a change is found, the status bit corresponding to the
indication point is updated and the memory bit is set if there
has been more than one change since the last host query.
This update method provides for an indication point update
time of approximately 5 - 10ms depending on how many
indication words are defined. The update time is lower with
fewer points defined. Therefore the number of words of
indication points should not be set any higher than
necessary. When the host requests the indication point data,
the change data is cleared in the module.
At this time, the functionality to switch from the SOE mode to
the Time based mode is not implemented.
Note: If both ports are receiving indication change report
requests, the first master to send a request will see
change. The change is cleared after either master
performs a read. In order for both masters to see the new
data, both masters should use the indication force report.
Indication Force Report - 7
This command returns the status and memory bit values for
the indication points that are requested by the host. This
data is derived from the data placed in the module when the
indication point section is transferred to the ControlLogix.
The actual logic to set and clear the indication bits must be
performed by the ladder logic. Indication point data must
transferred to the ControlLogix when the ladder program
detects an indication change.
At this time, the functionality to switch from the SOE mode to
the Time based mode is not implemented.
Digital Input Force Report - 11
This command is implemented in the module per the
protocol specification. 800 digital input values are supported
by the module. The module returns values for the specific
range of digital input blocks. Each block contains 16 binary
inputs. If the stop point number is larger that the largest
actual block number in the module, only values for actual
blocks are reported. If the stop point number is less than the
start point number, an error message is returned.