WAGO I/O-SYSTEM 750 Manual page 177

6.3.6.3.1 Structure of the Object ID
The object ID is composed of a group ID and a target ID. The group ID identi-
fies the functional group for which the status is to be queried. The target ID
indicates the target for which the status is to be queried. Either all existing
connections (0x0000) or individual connections (0x0001 to 0x0007) can be
chosen. A maximum of one connection exists in one slave; therefore, only the
target IDs 0x0000 and 0x0001 are valid in this case as well. For a master, the
target IDs 0x0000 and 0x0007 are valid. If the maximum of 7 devices have
been configured, the query of a target ID for which no device has been config-
ured returns the value MBX_STATE_ERROR_UNSPECIFIED (0x1000). If a
connection has been configured but could not be established, the query of the
corresponding target ID always returns the value
MBX_STATE_ERROR_CREATE_LINK (ox1002).
In order to calculate the group ID and target ID from an existing object ID,
and vice versa, the following logical links must be used:
Group
Group ID
0x0000
Wireless (status
of the wireless
connections),
0x1000
WAGO-I/O-SYSTEM 750
I/O Modules
Group_ID
Target_ID
Object_ID
Target- Description
ID
0x0000 The query of the group status always returns MBX_STATE_OK.
An error in the overall system indicates module failure.
0x0000 If not all devices are connected or if the bus module is in the
configuration mode, MBX_STATUS_ERROR_UNSPECIFIED
is returned as the group status, otherwise MBX_STATE_OK.
slave: If no device is linked for the corresponding table space,
0x0001 MBX_STATE_OK is always returned.
master: For existing connections, the following warnings can be issued
0x0001 for connection quality:
to - MBX_STATE_WARNING_BER_HIGH
0x0007 - MBX_STATE_WARNING_BER_MEDIUM
- MBX_STATE_WARNING_LESSTHEN_39_CHANNELS
- MBX_STATE_WARNING_LESSTHEN_54_CHANNELS
A master can deliver additional information on the connection
status:
- MBX_STATE_OK
if the corresponding slave is connected or has just connected
- MBX_STATE_ERROR_CREATE_LINK
if the slave could not be connected but further attempts to
connect are performed (device is configured but cannot
be reached)
Mailbox Command References
= Object_ID ∧ 0xF000
= Object_ID ∧ 0x0FFF
= Group_ID ∨ Target_ID
Appendix • 177