GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual
(Version 1.60, May/2017)
PAGE: 68
Item Trouble state
Solution
changed value of byte 0 to trigger the output command, when
output data can not send to modbus device in output data area
of Profibus master (please refer section 4.6.2 Output data area
and communication command).