Siemens DTU3005-B Betreibershandbuch PDF herunterladen (Seite 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 1110

1373 L1 On : L2,3,4 Off 1 0 0001

1374 L1,4 On : L2,3 Off 9 0 1001

1375 L1,3 On : L2,4 Off 5 0 0101

1376 L1,3,4 On : L2 Off 13 0 1101

1377 L1,2 On : L3,4 Off 3 0 0011

1378 L1,2,4 On : L3 Off 11 0 1011

1379 L1,2,3 On : L4 Off 7 0 0111

1380 L1,2,3,4 On 15 0 1111

Table 5.1 7SJ600 Relay Information (Continued)

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 140 141

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