Rockwell Automation SMC Dialog Plus, User Manual

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8-34 Serial Communications
Rung 3: When the FAULT RESET command is initiated at the RSView station, the SLC processor sets the output bit mapped to the SMC Dialog Plus
controller’s logic control word clear faults bit. The branch provides a logic “latched” circuit which exerts the FAULT RESET command until input from the SMC
Dialog Plus controller’s status word indicates that it has received the comand and has responded appropriately. The SMC Dialog Plus controller’s
CLEAR FAULT bit functions as long as all other logic control bits have been reset to zero.
Rung 4: When bit B3:0/0 is set, the 32 words beginning at N11:0 from the SLC processor are copied to the 1747-SDN scanner’s MO-file. The 1747-SDN
scanner sends this message out over the DeviceNet trunkline. The unlatch branch instruction resets B3:0/0 to zero for the next processor scan.
SMC
CLEAR FAULT
Command
SMC
CLEAR FAULT
Command SMC
Fault
Bit
FAULT RESET
From
RSVIEW
Initiate
Explicit
Message
Explicit
Message
Request
Copy File
Source
Dest
Length
N11:0
M0:1.224
32
: 1.7
: 1.7 : 1.7
B3
B3:0
B3
COP
275
0
0
U
3 7
3
Rung 5: When the 1747-SDN scanner has an Explicit Message response available, it sets bit 15 of its status word (I:1/15 in this example). The Explicit
Message response is then copied from the 1747-SDN scanner’s M1-file to the SLC processor’s N11 file, beginning at word 50. The branch copies a
command byte of 4 into the 1747-SDN scanner’s MO-file which directs it to discard the response data to prepare it for the next Explicit Message
operation.
Explicit
Message
Response
Available
Explicit
Message
Response
Copy File
Source
Dest
Length
Masked Move
Source
Equal
Source A
Mask
Source B
Dest
M1: 1.224
N11: 50
32
N11: 0
4<
00FFh
255<
M0: 1.224
?<
N11: 0
257<
N11: 50
257<
: 1
COP
MVM
EQU
15