Scanivalve MPS4232 - Multiple Unit Operations; Multiple Unit Scan Command

20
MPS4232
Section 3: Operation
Two (2) MPS4200s congured with:
SST = 12:00:00, SSD = 2021/2/10, RATE = 1Hz
1588 Date
(hh:mm:ss)
1588 Time
(YYYY/MM/DD)
Event
MPS 1 Frame # MPS 2 Frame #
MPS 1 PTP
Time Stamp
(seconds)
MPS 2 PTP
Time Stamp
(seconds)
11:59:55 2021/2/10
SCAN
to MPS 1
11:59:56 2021/2/10
11:59:57 2021/2/10
SCAN
to MPS 2
11:59:58 2021/2/10
11:59:59 2021/2/10
12:00:00 2021/2/10
12:00:01 2021/2/10 1 1 1612987201 1612987201
12:00:02 2021/2/10 2 2 1612987202 1612987202
12:00:03 2021/2/10 3 3 1612987203 1612987203
The following table describes a start scan me with two
MPS4200 units when SSD and SST are a me in the past.
Two (2) MPS4200s congured with:
SST = 12:00:00, SSD = 2021/2/10, RATE = 1Hz
1588 Date
(hh:mm:ss)
1588 Time
(YYYY/MM/DD)
Event
MPS 1 Frame # MPS 2 Frame #
MPS 1 PTP
Time Stamp
(seconds)
MPS 2 PTP
Time Stamp
(seconds)
12:59:55 2021/2/10
SCAN
to MPS 1
12:59:56 2021/2/10 1 1612990796
12:59:57 2021/2/10
SCAN
to MPS 2
2 1612990797
12:59:58 2021/2/10 3 1 1612990798 1612990798
12:59:59 2021/2/10 4 2 1612990799 1612990799
1:00:00 2021/2/10 5 3 1612990800 1612990800

When working with mulple scanners, the operaon can
be greatly simplied by using the integrated “mulple
unit” architecture. When the desired units are congured
into “clusters” of modules, a single connecon can be
established to any one of the modules in the cluster. Once
this connecon is established, any of the “Mulple Unit”
commands can be sent to the master unit which will in turn
pass of the command to the other modules in the cluster.
This allows many units to be started scanning, stopped or
calibrated all at the same me from a single command sent
to a single MPS4200 unit.
The MPS4200 uses the network mulcast feature to estab-
lish a MPS4200 device cluster. In all cases the user connects
to one MPS. This device becomes the master device. This
master then passes the relevant commands on to the other
devices that are members of the device cluster. Each MPS
has the ability to be a master or slave.
The membership of a MPS4200 into a cluster is estab-
lished by seng the variable MCAST to the same mulcast
address. All MPS4200 devices with the same MCAST seng
become members of the same MPS4200 cluster. Note that
changing the MCAST variable requires a SAVE to be issued
to the unit and the MPS to be rebooted before the change
becomes eecve. Mulple clusters may exist on the same
network. Mulcast addresses are limited to the range from
224.0.0.0 through 239.255.255.255.
Once the MPS units have been congured to be included
in a cluster and a connecon has been established with the
“master” unit - issue the command:
MFIND
A list of MPS modules included in the cluster will be
returned. Review the list to ensure it in inclusive of all units
that are expected to be included in the cluster. Once this
has been veried, a scan on all units can be iniated with
the command:
MSCAN
If at any point the scan needs to be terminated, issue the
command:
MSTOP
These “mulple unit” commands that allow control of the
cluster of scanners.
Other mulcast commands accepted include calibraon
and validaon commands that can be used for mulple
unit eld calibraons or validaons. For more informaon
on eld calibraons and validaons, please see the “Field
Calibraon and Validaon” procedure.

Mulple MPS units are started scanning by connecng
to one MPS and issuing a MSCAN command. This device
becomes the master and reissues a mulcast SCAN
command. See the table below for the scan start packet
format. All devices that are set up to listen to this mulcast
address will respond to the SCAN command. The slave
devices must sll fulll the SSD and SST requirements for
starng a scan.
