SM500F
Field mountable paperless recorder Appendix B – Modbus TCP/Modbus 485
IM/SM500F Rev. Z 151
Alarm 
Active/Inactive
Alarm Acknowledged
Alarm 
Active/Inactive
Alarm Acknowledged
Read
Access
0 = Alarm inactive
1 = Alarm active
0 = Acknowledged or 
inactive
1 = Active and 
unacknowledged
Read
Access
0 = Alarm inactive
1 = Alarm active
0 = Acknowledged or 
inactive
1 = Active and 
unacknowledged
Write
Access
None
0 = No effect
1 = Acknowledge
Write
Access
None
0 = No effect
1 = Acknowledge
Alarm Modbus Coil Modbus Coil Alarm Modbus Coil Modbus Coil
1.1A 0051 0101 2.1A 0067 0117
1.1B 0052 0102 2.1B 0068 0118
1.1C 0053 0103 2.1C 0069 0119
1.1D 0054 0104 2.1D 0070 0120
1.2A 0055 0105 2.2A 0071 0121
1.2B 0056 0106 2.2B 0072 0122
1.2C 0057 0107 2.2C 0073 0123
1.2D 0058 0108 2.2D 0074 0124
1.3A 0059 0109 2.3A 0075 0125
1.3B 0060 0110 2.3B 0076 0126
1.3C 0061 0111 2.3C 0077 0127
1.3D 0062 0112 2.3D 0078 0128
1.4A 0063 0113 2.4A 0079 0129
1.4B 0064 0114 2.4B 0080 0130
1.4C 0065 0115 2.4C 0081 0131
1.4D 0066 0116 2.4D 0082 0132
1.5A 0083 0133 2.5A 0091 0141
1.5B 0084 0134 2.5B 0092 0142
1.5C 0085 0135 2.5C 0093 0143
1.5D 0086 0136 2.5D 0094 0144
1.6A 0087 0137 2.6A 0095 0145
1.6B 0088 0138 2.6B 0096 0146
1.6C 0089 0139 2.6C 0097 0147
1.6D 0090 0140 2.6D 0098 0148
Table B.3 Alarm States