Flowserve MX-100 Field Unit Instrukcja Użytkownika Pobierz pdf (Strona 15)

MX/DDC-100 Field Unit Installation and Maintenance FCD LMENIM2329-01 – 03/11

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Message Breakdown

Query Response

03 Slave (Field Unit) Address 03 Slave (Field Unit) Address

01 Function 01 Function

00 Starting Address Hi 01 Byte Count

00 Starting Address Lo 18

Data (Coils 8 - 1)

00 No. of Points Hi 503A Error Check (CRC)

08 No. of Points Lo

3C2E Error Check (CRC)

Note 1: 18h equals 00011000 or coils 4 and 5 are ON.

2.3.4 Modbus Function Code 02 (Read Input Status)

This function code is used to read the discrete input status bits in the DDC-100 Field Unit. The use of this function

code will provide the user with the input status bits that are used to develop holding registers 9 through 13. The

status bit inputs are contained in locations 10129-10208 for each DDC-100 Field Unit and are deﬁned in Table 2.3.

Table 2.3 – Status Bit Deﬁnitions

Bit Number

Modbus

Bit

Address

MX/DDC

129 128 Opened

130 129 Closed

131 130 Stopped in mid-travel

132 131 Opening

133 132 Closing

134 133 Valve jammed

135 134 Not in remote

136 135 Combined fault

137 136 Over-temperature fault

138 137 Actuator failing to de-energize

139 138 Channel A fault

140 139 Channel B fault

141 140 Open torque switch fault

142 141 Close torque switch fault

143 142 Valve operated manually fault

144 143 Phase error

145 144 Open inhibit active

146 145 Close inhibit active

147 146 Not used

148 147 Not used

149 148 One or more phases is missing

150 149 Reverse phase sequence is occurring

151 150 ESD conﬂict

152 151 Inhibit conﬂict

153 152 Use in local/stop (input must be set for CSE and enabled)

154 153 Not used

155 154 Network emergency shutdown (ESD) is active

156 155 Local emergency shutdown is active

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 65 66

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