Delta AH500 Programming Manual page 589

8. If the communication timeout occurs, SM104 and SM105 are ON, and SM98 and SM99 are
OFF.
9. If the error occurs during the reception of the data, SM102 and SM103 are ON, and SM98 and
SM99 are OFF.
10. If the function code specified by S
equipment with which the AH500 series PLC communicates has to be the word device. If the
function code specified by S
with which the AH500 series PLC communicates has to be the bit device.
11. The flags related to the instruction MODRW:
Flag
COM1
SM96
SM98
SM100
SM102
SM104
SM209
Please refer to the explanation of the instruction RS for more information about the functions of
the flags.
is related to the word device, the device in the external
2
is related to the bit device, the device in the external equipment
2
COM2
The data is sent through COM1/COM2.
SM97
Waiting to receive the reply through
SM99
COM1/COM2
Reception through COM1/COM2 is
SM101
complete.
An error occurs during the reception of the
SM103
data through COM1/COM2
No data is received through COM1/COM2
SM105
after a specified period of time.
The communication protocol of COM1
SM211 changes (in accordance with SM210,
SR201, SR209, and SR215).
C ha pt er 6 A p pl i e d In s tr uc t io n
Description
6 - 4 2 1