Siemens DTU3005-B - Manual (Page 47)

5
Creating Project Files—Modbus Master to Devices
Siemens Energy & Automation, Inc. 43
Once you are finished entering data, select Save to
save your configuration, then select Ok to exit the dia-
log box. Select Revert to bring back the previous set-
tings.
5.9 Global Command Registers
This option allows you to specify global commands
for all the devices specified in the Device List. It is only
available for VDEW devices.
The Global Command Registers consist of six regis-
ters. These registers allow the PLC to transmit com-
mands to all the devices in the Device List. To send a
command, all the PLC needs to do is to place the com-
mand values into the appropriate PLC registers, which
the DTU3005 unit reads and then processes.
5.10 Device Diagnostic Registers
This option programs the DTU3005 to send communi-
cations diagnostic information to a set of registers
that can be read by the Modbus Master device. This
option allows the Modbus Master to collect diagnostic
information by reading the registers assigned here.
The information can be used to troubleshoot prob-
lems with the devices and the communications net-
work.
The format and content of the diagnostic registers are
described in detail in Appendix F.
1. To configure the device diagnostic registers,
select Diagnostics from the Edit menu. The fol-
lowing screen displays:
2. To enable the sending of diagnostic information to
the Modbus Master, select the Do you want to set
up device diagnostics registers?
checkbox with
the mouse or the spacebar. Then enter the start-
ing register number in the Modbus Registers:
field. The register block is 6 bytes long. These are
written to the holding register area (40000 to
49999). Thus entering a 1 in this field represents
1372 L2,3,4 On : L1 Off 14 0 1 1 1 0
1373 L1 On : L2,3,4 Off 1 0 0 0 0 1
1374 L1,4 On : L2,3 Off 9 0 1 0 0 1
1375 L1,3 On : L2,4 Off 5 0 0 1 0 1
1376 L1,3,4 On : L2 Off 13 0 1 1 0 1
1377 L1,2 On : L3,4 Off 3 0 0 0 1 1
1378 L1,2,4 On : L3 Off 11 0 1 0 1 1
1379 L1,2,3 On : L4 Off 7 0 0 1 1 1
1380 L1,2,3,4 On 15 0 1 1 1 1
Table 5.1 7SJ600 Relay Information (Continued)