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8 DDC-100 Direct-to-Host Programming Guide FCD LMAIM4019-00 FCD LMAIM4019-00 DDC-100 Direct-to-Host Programming Guide 9

Table 3.3 – DDC-100 Coil Assignments, Modbus Function Code 01 Usage for Digital Outputs

Coil

Number

Bit

Number

MX/DDC UEC-3-DDC DDC-100 Clamshell I/O Module

1 00 Close / Stop Close / Stop Close / Stop Do Not Use

2 01 Open / Stop Open / Stop Close / Stop Do Not Use

3 02 AS-1 Lockout or Relay #3 Lockout or Relay #3 Relay #3

4 03 AS-2 Do Not Use Relay #4 Relay #4

5 04 AS-3 Do Not Use Relay #5 Relay #5

6 05 AS-4 Relay #6 Relay #6 Relay #6

7 06 AR-1 (Opt) Do Not Use Do Not Use Relay #21

8 07 AR-2 (Opt) Do Not Use Do Not Use Relay #12

9 08 AR-3 (Opt) Do Not Use Do Not Use Do Not Use

Note 1: Relay #2 is physical Relay K2.

Note 2: Relay #1 is physical Relay K1.

Example

Poll ﬁeld unit number 3 for 8 coils starting at coil 1.

Query 0301000000083C2E

Response 03010118503A

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 1 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.

3.2.2 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 3.4.

Table 3.4 – Status Bit Deﬁnitions

Bit Number

Modbus

Bit

Address

UEC-3-DDC and DDC-100 Clamshell I/O Module

129 128 Opened Not Used

130 129 Closed Not Used

131 130 Stopped Not Used

132 131 Opening Not Used

133 132 Closing Not Used

134 133 Valve jammed Not Used

135 134 Actuator switched to local mode Not Used

136 135 Combined fault Not Used

Table 3.4 – Status Bit Deﬁnitions (continued)

Bit Number

Modbus

Bit

Address

UEC-3-DDC and DDC-100 Clamshell I/O Module

137 136 Over-temperature fault Not Used

138 137 Actuator failing to de-energize Not Used

139 138 Channel A fault Channel A fault

140 139 Channel B fault Channel B fault

141 140 Open torque switch fault Not Used

142 141 Close torque switch fault Not Used

143 142 Valve operated manually fault Not Used

144 143 Phase error Not Used

145 144

Input “open verify” is not active after open

command is initiated

Not Used

146 145

Input “close verify” is not active after close

command is initiated

Not Used

147 146

Input “open verify” is active after open

command is de-energized

Not Used

148 147

Input “close verify” is active after close

command is de-energized

Not Used

149 148

“Ph_det” (Phase Detect) input is active.

One or more phases is missing

Not Used

150 149

“Ph_seq” (Phase Sequence) input is active.

Reverse phase sequence is occurring

Not Used

151 150

Valve manually moved from mid-travel to

open

Not Used

152 151

Valve manually moved from open to

mid-travel

Not Used

153 152

Valve manually moved from mid-travel to

154 153

Valve manually moved from close to

mid-travel

Not Used

155 154

Network emergency shutdown (ESD) is

active

Not Used

156 155 Local emergency shutdown is active Not Used

157 156

Field unit microprocessor has reset since

the last poll

Not Used

158 157 Wrong rotation Not Used

159 158 Opening in local mode Not Used

160 159 Closing in local mode Not Used

161 160 Close contactor (interlocked) Not Used

162 161 Open contactor (interlocked) Not Used

163 162 Lockout or user, Relay 3 Relay 3

164 163

Local pushbutton switch LED (UEC-3)

Relay 4 (Clamshell)

Relay 4

165 164

Local pushbutton switch LED (UEC-3)

Relay 5 (Clamshell)

Relay 5

166 165 User, Relay 6 Relay 6

167 166 Close contactor (non-interlocked) Relay 2 (K2)

168 167 Open contactor (non-interlocked) Relay 1 (K1)

169 168 Field unit software vs. ID Field unit software vs. ID

170 169 Field unit software vs. ID Field unit software vs. ID

171-176 170-175 Field unit software vs. ID Field unit software vs. ID

177 176 Remote switch User Input 8

178 177 Thermal overload User Input 9

1 2 3 4 5 6 7 8 9 10 11 12 ... 32 33

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